Texas Instruments TI-84 Plus Manual Book
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Texas Instruments TI-84 Plus Manual Book

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TI-84 Plus
TI-84 Plus Silver Edition
Guidebook

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Summary of Contents for Texas Instruments TI-84 Plus

  • Page 1 TI-84 Plus TI-84 Plus Silver Edition Guidebook...

  • Page 2: Important Information

    "as-is" basis. In no event shall Texas Instruments be liable to anyone for special, collateral, incidental, or consequential damages in connection with or...
  • Page 3 • Consult the dealer or an experienced radio/television technician for help. Caution: Any changes or modifications to this equipment not expressly approved by Texas Instruments may void your authority to operate the equipment.

  • Page 4: About The Ti-84 Plus And Ti-84 Plus Silver Edition

    TI-84 Plus Silver Edition. Since all the functions of the TI-84 Plus Silver Edition and the TI-84 Plus are the same, this guidebook can be used for either the TI-84 Plus or the TI-84 Plus Silver Edition.

  • Page 5: Table Of Contents

    Contents Important Information..............ii About the TI-84 Plus and TI-84 Plus Silver Edition....... iv About this book................iv 1 Getting Started ..............1 TI-84 Plus keys................. 1 Turning the TI-84 Plus on and off..........2 Home screen ................... 3 y and ƒ keys ................ 5 ‘...
  • Page 6 A Appendix A: Functions and Instructions .......... 131 Appendix B: Reference Information..........175 Variables ..................175 Statistics Formulas............... 177 Financial Formulas ..............181 Important Things You Need to Know About Your TI-84 Plus .. 185 Error Conditions................188 Accuracy Information ..............196...
  • Page 7 Appendix C: Service and Warranty Information ......199 Texas Instruments Support and Service........199 Texas Instruments (TI) Warranty Information......200 Battery Information ..............202 In Case of Difficulty ..............204 Index ................207...
  • Page 8 viii...

  • Page 9: Getting Started

    Getting Started TI-84 Plus keys } ~ † | Provides access Let you to the function or move the cursor in character shown four directions. above each key. ‘ Clears ƒ (erases) the entry Provides line or deletes an access to the...

  • Page 10: Turning The Ti-84 Plus On And Off

    Turning the TI-84 Plus on and off To turn on the TI-84 Plus, press É. The É key is located at the lower left corner of the TI-84 Plus. To turn off the TI-84 Plus, press the y key followed by the É key. OFF function of É.

  • Page 11: Home Screen

    Home screen When you turn on your TI-84 Plus the first time, you should see this screen: To clear this text from your screen, press ‘ twice. You should now see the home screen, a blank screen with a flashing cursor. The home screen is where you enter problems and see results.
  • Page 12 Example: Multiply 5 x 4. Press Result ¯ Í Getting Started...

  • Page 13: Y And F Keys

    ƒ keys Most keys on the TI-84 Plus can perform two or more functions. To use a function printed on a key, press the key. To use a function printed above a key, you must first press the y key or the ƒ key.

  • Page 14: And Y 5

    The ‘ key erases the home screen. This key is located just below the four arrow keys at the upper right corner of the TI-84 Plus keyboard. If you press ‘ during an entry, it clears the entry line. If you press ‘...

  • Page 15: Entering An Expression

    Entering an expression An expression consists of numbers, variables, operators, functions, and their arguments that evaluate to a single answer. 2X + 2 is an expression. Type the expression, and then press Í to evaluate it. To enter a function or instruction on the entry line, you can: Press its key, if available.

  • Page 16: Interchangeable Faceplates

    Interchangeable Faceplates The TI-84 Plus Silver Edition has interchangeable faceplates that let you customize the appearance of your unit. To purchase additional faceplates, refer to the TI Online Store at education.ti.com Removing a Faceplate Lift the tab at the bottom...

  • Page 17: Using The Clock

    Using the Clock Use the Clock to set the time and date, select the clock display format, and turn the clock on and off. The clock is turned on by default and is accessed from the mode screen. Displaying the Clock Settings Press z Press the †...
  • Page 18 Error Messages If you type the wrong date for the month, for example: June 31, June does not have 31 days, you will receive an error message with two choices: • To Quit the Clock application and return to the Home screen, select 1: Quit. Press Í.
  • Page 19 Using the Mode Screen to turn the clock on If the Clock is turned off, Press † to highlight TURN CLOCK ON Press Í. Using the Catalog to turn the clock on If the Clock is turned off, Press y N Press †...

  • Page 20: Ti-84 Plus Menus

    TI-84 Plus menus Many functions and instructions are entered on the home screen by selecting from a menu. To select an item from the displayed menu: • Press the number or letter shown at the left of that item. — or —...
  • Page 21 . † † Í Press y 5 or ‘ to close the FORMAT menu and return to Note: the home screen. Summary of menus on the TI-84 Plus Press To display Œ TI-84 Plus menu — to see a list of APPLICATIONS graphing calculator software applications (APPS).
  • Page 22 — to define statistical plots. STAT PLOTS menu — to select from a complete, CATALOG alphabetic list of all TI-84 Plus built-in functions and instructions. menu — to define a graph’s appearance. FORMAT y > menu — to define, view, and edit matrices.

  • Page 23: Editing And Deleting

    Editing and deleting You can change any expression or entry using the backspace | key, the delete { key, or the insert y 6 key. Example: Enter the expression 5 + 1, and then change the expression to + 5. Press Result ¡...
  • Page 24 Press Result ¹ Í + 2 N 5 using y [ to Example: Change the example above to 5 recall the expression and y 6 to insert + 2 into the expression. Press Result | | y 6 Ã Í Getting Started...

  • Page 25: Using ¹ And Ì

    Result ¹ Ì Í Note: Notice that the TI-84 Plus displays a slightly different symbol for negation and subtraction to make it easier for you to distinguish between the two. The negative symbol is raised and slightly shorter. Getting Started...

  • Page 26: Using Parentheses

    Using parentheses Since all calculations inside parentheses are completed first, it is sometimes important to place a portion of an expression inside parentheses. Example: Multiply 4…1+2; then multiply 4…(1+2). Press Result ¯ Ã Í ¯ £ Ã ¤ Í The closing parenthesis ¤ is optional. The operation will be Note: completed if you omit it.
  • Page 27 -- - Example: Calculate 16 ^ Press Result › £ ¥ ¤ Í Example: Calculate (L3) Press Result £ Ì ¤ ¡ Í Note: Try each of these examples without the parentheses and see what happens! Getting Started...

  • Page 28: Storing A Value

    Storing a value Values are stored to and recalled from memory using variable names. Example: Store 25 to variable A and multiply A by 2. Press Result ¿ ƒ [A] Í ¯ ƒ [A] Í — or — ƒ [A] ¯ Í...
  • Page 29 Press Result „ › ¹ „ ¡ ¹ „ Ã Í You can remove a value stored to a variable using the DELVAR function or by storing 0 to the variable. Example: Delete the value (L.5) stored to X above by storing 0. Press Result ¿„...

  • Page 30: Graphing A Function

    Graphing a function Displays the Y= Displays Editor, where you the graph you can enter one or have defined. more functions or expressions to graph. „ Lets you Lets Lets you enter Lets you quickly adjust you set the one of four symbols: move the cursor the window to viewing...
  • Page 31 Example: Graph the function Y = X + 1. Press Result „ ¡ Ã If Y1 is not empty, press ‘. If there are additional entries in Note: the Y= Editor, press † ‘ until all are clear. Getting Started...

  • Page 32: Changing Mode Settings

    Changing mode settings The mode settings determine how entries are interpreted and how answers are displayed on the TI-84 Plus. Float Example: Change the mode setting for decimals from decimal places. Press Result † ~ ~ ~ ~ Í Ë...
  • Page 33 Setting Choices *Float Decimal • : lets the number of decimal places change based on the result (up to 10 digits) 0–9: • sets the number of decimal places to a value – 9) that you specify *Radian: Angle • interprets angle values as radians measure Degree:...
  • Page 34 The importance of mode settings Example: Multiply 2/3 Q 2. Press Result z † ~ Í ¥ ¯ Í Your first reaction to this example is that the graphing calculator has produced a wrong answer. But you have set it to round to 0 decimal places (the nearest whole number), so for this setting the answer is correct.

  • Page 35: Setting The Graphing Window

    Setting the graphing window To obtain the best view of the graph, you may need to change the boundaries of the window. To display the WINDOW Editor, press p. Ymax Xmin Xscl Xmax Ymin Yscl Window variables (shown in Corresponding viewing WINDOW Editor) window (shown on Graph window)
  • Page 36 Example: Change the window settings to display a maximum X value of 25, a minimum X value of L25, a maximum Y value of 50, and a minimum Y value of L50. Press Result Ì † † † Ì † Getting Started...

  • Page 37: Using Q

    Using The TI-84 Plus has ten predefined window settings that let you quickly adjust the graph window to a predetermined level of magnification. To display this menu, press q. Selection Result 1: ZBox Lets you draw a box (using the cursor pad) to define the viewing window.

  • Page 38: Building A Table

    Building a table Tables are useful tools for comparing values for a function at multiple points. N 2X at each Example: Build a table to evaluate the function Y = X integer between L10 and 10. Press Result z † † † Í...
  • Page 39 Press Result Press † repeatedly to see the changes in X and Y. Note: Clearing the Y= Editor Before proceeding with the remaining examples in this guidebook, clear the Y= Editor. Press Result ‘ Getting Started...

  • Page 40: Using The Catalog

    Using the CATALOG The CATALOG is an alphabetic list of all functions and instructions on the TI-84 Plus. Some of these items are also available on keys and menus. To select from the CATALOG: Position the cursor where you want to insert the item.

  • Page 41: Performing Simple Calculations

    Performing simple calculations Changing a decimal to a fraction Example: Add 1/2 + 1/4 and change your answer to a fraction. Press Result ¥ Ã ¥ Í  Í Finding the least common multiple Example: Find the least common multiple of 15 and 24. Press Result ...
  • Page 42 Finding the factorial of numbers Example: Compute the factorials of 5 and of 30. Press Result  ~ ~ ~ Í  ~ ~ ~ Í Scientific notation Solving trigonometric functions Example: Find the sine of an angle of 72¡. Press Result ˜...
  • Page 43 Adding Complex Numbers Example: Add (3+5×) + (2-3×). Press Result £ Ã y V ¤ Ã £ ¹ y V ¤ Í The × character is the second function of Ë (the decimal key). Note: Getting Started...

  • Page 44: Using The Equation Solver

    Using the equation solver You can use the TI-84 Plus equation solver to solve for a variable in an equation. N 13X N 48 = 0. Example: Find the roots for the equation X Press Result  } Í as shown above, press } (the up arrow), and...
  • Page 45 Press Result ƒ \ 1 0 0 ƒ \ The two roots are M3 and 16. Since you did not enter a guess, the TI-84 Plus used 0 (the default guess) and first returned the answer nearest 0. To find other roots, you must enter another guess. In this example, you entered 100.

  • Page 46: Entering Data Into Lists

    Entering data into lists You can enter data into lists using either of two methods: Using braces and ¿ on the home screen • — or — • Using the statistical list editor. ¿ Using Example: Store 1, 2, 3, and 4 to list 1 (L1). Press Result ¢...
  • Page 47 Press Result ~ } ‘ Í (if L2 already contains data) Í Í Í Í y 5 y e Í (displays the contents of the list on the home screen) Getting Started...

  • Page 48: Plotting Data

    You will need to: Determine which lists contain your data. Tell the TI-84 Plus which lists of data you want to plot and define the plot. Display the plot. Determine which lists contain your data...
  • Page 49 Press Result Í (turns plots off if any plots are on) Í Í (turns Plot1 on) † † y 9 Í (enters L1 as the Xlist) † y 9 † Í (enters L2 as the Ylist) Getting Started...
  • Page 50 Press Result † ~ Í (selects + as the plotting mark) o ‘ Note: This step is optional and is not necessary unless there is a previous entry in the Y= Editor. If there are additional entries in the Y= Editor, press †...

  • Page 51: Calculating A Linear Regression

    Calculating a linear regression If you wish to calculate the linear regression for data, you can do so using instruction from the … CALC menu. LinReg Example: Calculate the linear regression for the data entered in L1 and Press Result …...

  • Page 52: Calculating Statistical Variables

    Calculating statistical variables The TI-84 Plus lets you easily calculate one-variable or two-variable statistics for data that you have entered into lists. Example: Using the data that you entered into L1 from the previous section “Using ¿“, calculate one-variable statistics.

  • Page 53: Using The Matrix Editor

    Using the MATRIX Editor Creating a new matrix Press Result y > | Í Í Í Í Í Í Í When you press Í, the cursor automatically highlights the Note: next cell so that you can continue entering or editing values. To enter a new value, you can start typing without pressing Í, but you must press Í...
  • Page 54 Example: Solve 3X + 3Y = 24 and 2X + Y = 13 Press Result y > ~ ~ † Í Í Í Í Í Í Í Í Í y > ~ Getting Started...
  • Page 55 Press Result } } } } } Í y > † Í Í You can interpret the resulting matrix as: [1 0 5] represents 1X + 0Y = 5 or X = 5 [0 1 3] represents 0X + 1Y = 3 or Y = 3 The solution to this system of equations is X = 5, Y = 3.

  • Page 56: Grouping

    Grouping lets you make a copy of two or more variables and store them in the Flash memory of the TI-84 Plus. This function is similar to “zipping” a computer file and storing it. For example, suppose that you want to save data you collected for time, temperature, humidity, and barometric pressure because you may need to use the data for another assignment.
  • Page 57 Press Result Í Í † Í † Í Í Getting Started...

  • Page 58: Ungrouping

    Ungrouping To use variables that have been grouped, you must ungroup. Example: Ungroup GROUPA. Press Result Í (to overwrite all three lists) Getting Started...

  • Page 59: Error Messages

    Error messages Occasionally, when you enter a function or instruction or attempt to display a graph, the TI-84 Plus will return an error message. For more details, see Appendix B Example: Enter the least common multiple function followed by lcm( only one number.

  • Page 60: Resetting Defaults

    Resetting defaults If you are getting unexpected results, or if another person has used your TI-84 Plus and may have changed the settings, you should consider resetting defaults on the TI-84 Plus. Press Result WARNING: If you reset All RAM in step 3 above, you will delete stored variables, lists, and programs.

  • Page 61: Installing Applications

    TI-84 Plus by installing Apps. This is similar to the way that you add new features to your computer by installing new software applications. You can find applications for the TI-84 Plus at the TI Online Store at . Once you have downloaded an application to your education.ti.com computer, you must use TI Connect™...

  • Page 62: Running Applications

    Running applications Once you have installed an application on your TI-84 Plus, you must start the application to use its features. Example: Start the Catalog Help (CtlgHelp) app on the TI-84 Plus. Press Result Œ † † Í Getting Started...

  • Page 63: Quick Reference

    Quick reference Press Darken the screen y † Lighten the screen Move the cursor to the end of an expression Move the cursor to the beginning of an expression ƒ † Page down to the next screen (on menus) ƒ } Page up to the next screen (on menus) Place your last entry on the current entry line on the home screen...

  • Page 64: Battery Precautions

    Battery precautions Take these precautions when replacing batteries. • Do not leave batteries within the reach of children. • Do not mix new and used batteries. Do not mix brands (or types within brands) of batteries. • Do not mix rechargeable and non-rechargeable batteries. Install batteries according to polarity (+ and N ) diagrams.

  • Page 65: Activities

    Activities The Quadratic Formula Entering a Calculation Use the quadratic formula to solve the quadratic equations N x + 3 = 0. Begin with the equation + 5x + 2 = 0 and 2x + 5x + 2 = 0. ¿...
  • Page 66 Press Í to find one solution for the equation 3x + 5x + 2 = 0. The answer is shown on the right side of the display. The cursor moves to the next line, ready for you to enter the next expression.
  • Page 67 N x + 3 = 0. When you set Now solve the equation 2x complex number mode, the TI-84 Plus displays complex results. Press z † † † † † † (6 times), and then press ~ to position the cursor over .
  • Page 68 Press y [ repeatedly until this quadratic-formula expression is displayed: – – -------------------------------------- - Press Í to find the other solution for N x + 3 = 0. the quadratic equation: 2x Note: An alternative for solving equations for real numbers is to use the built-in Equation Solver.

  • Page 69: Box With Lid

    Box with Lid Defining a Function Take a 20 cm × 25 cm. sheet of paper and cut X × X squares from two corners. Cut X × 12½ cm rectangles from the other two corners as shown in the diagram below. Fold the paper into a box with a lid. What value of X would give your box the maximum volume V? Use the table and graphs to determine the solution.
  • Page 70 Defining a Table of Values The table feature of the TI-84 Plus displays numeric information about a function. You can use a table of values from the function you just defined to estimate an answer to the problem. Press y - (above p) to display menu.
  • Page 71 Zooming In on the Table You can adjust the way a table is displayed to get more information about a defined function. With smaller values for @ , you can zoom in on the table. Í to set . Press Ë Press TblStart Í...
  • Page 72 .01-centimeter increments. Setting the Viewing Window You also can use the graphing features of the TI-84 Plus to find the maximum value of a previously defined function. When the graph is activated, the viewing window defines the displayed portion of the coordinate plane.
  • Page 73 Displaying and Tracing the Graph Now that you have defined the function to be graphed and the window in which to graph it, you can display and explore the graph. You can trace along a function using the feature. TRACE Press s to graph the selected function in the viewing window.
  • Page 74 Press q to display the menu. ZOOM This menu is a typical TI-84 Plus menu. To select an item, you can either press the number or letter next to the item, or you can press † until the item number or letter is highlighted, and then press Í.
  • Page 75 Press p to display the new window settings. Finding the Calculated Maximum You can use a menu operation to calculate a local maximum CALCULATE of a function. Press y / (above r) to display the menu. Press to select CALCULATE 4:maximum The graph is displayed again with a prompt.
  • Page 76 Ë , and then press Í to Or, press enter a guess for the maximum. When you press a number key in TRACE prompt is displayed in the bottom- left corner. Notice how the values for the calculated maximum compare with the maximums found with the free-moving cursor, the trace cursor, and the table.

  • Page 77: Comparing Test Results Using Box Plots

    Comparing Test Results Using Box Plots Problem An experiment found a significant difference between boys and girls pertaining to their ability to identify objects held in their left hands, which are controlled by the right side of their brains, versus their right hands, which are controlled by the left side of their brains.
  • Page 78 Press … to select 1:Edit Enter into the number of correct guesses each woman made WLEFT ). Press ~ to move to using her left hand ( Women Left WRGHT enter the number of correct guesses each woman made using her right hand ( Women Right Likewise, enter each man’s correct guesses in...
  • Page 79 10. Compare the left-hand results. Redefine plot 1 to use WLEFT , and then press r to examine redefine plot 2 to use MLEFT minX , and for each plot. Who were the better left- maxX hand guessers, men or women? 11.

  • Page 80: Graphing Piecewise Functions

    Graphing Piecewise Functions Problem The fine for speeding on a road with a speed limit of 45 kilometers per hour (kph) is 50; plus 5 for each kph from 46 to 55 kph; plus 10 for each kph from 56 to 65 kph; plus 20 for each kph from 66 kph and above. Graph the piecewise function that describes the cost of the ticket.

  • Page 81: Graphing Inequalities

    Graphing Inequalities Problem N 3x + 5 < 0.2x + 4. Use the Graph the inequality 0.4x menu TEST operations to explore the values of X where the inequality is true and where it is false. Procedure Press z. Select , and the default settings.
  • Page 82 Press r. Notice that the values of are zero where the inequality is false. Activities...

  • Page 83: Solving A System Of Nonlinear Equations

    Solving a System of Nonlinear Equations Problem N2x=2cos(x). Stated another way, Using a graph, solve the equation x N2x and y = solve the system of two equations and two unknowns: y = x 2cos(x). Use factors to control the decimal places displayed on the ZOOM graph.
  • Page 84 Press q. Select and repeat steps 4 through 8 to explore 2:Zoom In the apparent function intersection on the left side of the display. Activities...

  • Page 85: Using A Program To Create The Sierpinski Triangle

    Using a Program to Create the Sierpinski Triangle Setting up the Program This program creates a drawing of a famous fractal, the Sierpinski Triangle, and stores the drawing to a picture. To begin, press  ~ ~ , and then press Í. The program .
  • Page 86 After you execute the program above, you can recall and display the picture with the instruction RecallPic 6 Activities...

  • Page 87: Graphing Cobweb Attractors

    Graphing Cobweb Attractors Problem Using format, you can identify points with attracting and repelling behavior in sequence graphing. Procedure Press z. Select and the default mode settings. Press y .. Select format and the default format settings. Press o. Clear all functions and turn off all stat plots. Enter the sequence that corresponds to the expression Y = K X(1NX).

  • Page 88: Using A Program To Guess The Coefficients

    Using a Program to Guess the Coefficients Setting Up the Program This program graphs the function A sin(BX) with random integer coefficients between 1 and 10. Try to guess the coefficients and graph your guess as C sin(DX). The program continues until your guess is correct.
  • Page 89 :If C=A :Text(1,1,"C IS OK") :If CƒA Display results. :Text(1,1,"C IS WRONG") :If D=B :Text(1,50,"D IS OK") :If DƒB :Text(1,50,"D IS WRONG") :DispGraph Display graph. :Pause :If C=A and D=B Quit if guesses are correct. :Stop :Goto Z Activities...

  • Page 90: Graphing The Unit Circle And Trigonometric Curves

    Graphing the Unit Circle and Trigonometric Curves Problem Using parametric graphing mode, graph the unit circle and the sine curve to show the relationship between them. Any function that can be plotted in mode can be plotted in Func mode by defining the component as and the component as...

  • Page 91: Finding The Area Between Curves

    Finding the Area between Curves Problem Find the area of the region bounded by: f(x) 300x / (x + 625) g(x) 3cos(.1x) Procedure Press z. Select the default mode settings. Press p. Set the viewing window. Xmin=0 Ymin= Xres=1 Xmax=100 Ymax=10 Xscl=10 Yscl=1...

  • Page 92: Using Parametric Equations: Ferris Wheel Problem

    Using Parametric Equations: Ferris Wheel Problem Problem Using two pairs of parametric equations, determine when two objects in motion are closest to each other in the same plane. A ferris wheel has a diameter (d) of 20 meters and is rotating counterclockwise at a rate (s) of one revolution every 12 seconds.
  • Page 93 Try setting the graph styles to ë and ì Note: , which simulates a chair on the ferris wheel and the ball flying through the air when you press s. Press s to graph the equations. Watch closely as they are plotted.
  • Page 94 You can use r to, in effect, take snapshots in time and explore the relative behavior of two objects in motion. Activities...

  • Page 95: Demonstrating The Fundamental Theorem Of Calculus

    Demonstrating the Fundamental Theorem of Calculus Problem 1 Using the functions from the menu to graph fnInt( nDeriv( MATH functions defined by integrals and derivatives demonstrates graphically that: ∫ F x ( ) x ( ) x 0 > and that ∫...
  • Page 96 Press r. Again, use the cursor keys to compare the values of the two graphed functions, Problem 2 Explore the functions defined by ∫ ∫ ∫ , and Procedure 2 Press o. Turn off all functions and stat plots. Use a list to define these three functions simultaneously.
  • Page 97 Activities...

  • Page 98: Computing Areas Of Regular N-Sided Polygons

    Computing Areas of Regular N-Sided Polygons Problem Use the equation solver to store a formula for the area of a regular N-sided polygon, and then solve for each variable, given the other variables. Explore the fact that the limiting case is the area of a circle, pr Consider the formula A = NB sin(pàN) cos(pàN) for the area of a regular polygon with N sides of equal length and B distance from the center to a...
  • Page 99 Now solve for for a given area with various number of sides. Enter . To find the distance , move the cursor onto , and A=200 then press ƒ \. Enter . To find the distance , move the cursor onto , and then press ƒ...
  • Page 100 area of an N-sided regular polygon, with r as the distance from the center to a vertex, approaches the area of a circle with radius r (pr as N gets large. Activities...

  • Page 101: Computing And Graphing Mortgage Payments

    Computing and Graphing Mortgage Payments Problem You are a loan officer at a mortgage company, and you recently closed on a 30-year home mortgage at 8 percent interest with monthly payments of 800. The new home owners want to know how much will be applied to the interest and how much will be applied to the principal when they make the 240th payment 20 years from now.
  • Page 102 Note: and G are located on the menu ( Prn( Int( FINANCE APPS 1:FINANCE Press p. Set these window variables. Tmin=1 Xmin=0 Ymin=0 Tmax=360 Xmax=360 Ymax=1000 Tstep=12 Xscl=10 Yscl=100 Note: To increase the graph speed, change Tstep Press r. After the graph is drawn, press Í...
  • Page 103 At which monthly payment will the principal allocation surpass the interest allocation? Activities...
  • Page 104 Activities...

  • Page 105: Memory And Variable Management

    Memory and Variable Management Checking Available Memory MEMORY Menu At any time you can check available memory or manage existing memory by selecting items from the menu. To access this menu, press MEMORY y L. MEMORY Displays information about the graphing 1: About...
  • Page 106 Available RAM, Archive, and App Slots The TI-84 Plus / TI-84 Plus Silver Edition has Archive, RAM, and Application (App) slot memory for you to use and manage. The available RAM stores computations, lists, variables, and data. The available Archive lets you store programs, Apps, groups, and other variables.
  • Page 107 Select to display the 2:Mem Mgmt/Del MEMORY menu. The TI-84 Plus expresses memory MANAGEMENT/DELETE quantities in bytes. Select variable types from the list to display memory usage. Notes: , and variable types never reset to...

  • Page 108: Deleting Items From Memory

    Deleting Items from Memory Deleting an Item To increase available memory by deleting the contents of any variable (real or complex number, list, matrix, variable, program, Apps, AppVars, picture, graph database, or string), follow these steps. Press y L to display the menu.

  • Page 109: Clearing Entries And List Elements

    Clearing Entries and List Elements Clear Entries clears the contents of the (last entry on home Clear Entries ENTRY screen) storage area. To clear the storage area, follow these steps. ENTRY Press y L to display the menu. MEMORY Select to paste the instruction to the home screen.

  • Page 110: Archiving And Unarchiving Variables

    Archiving and UnArchiving Variables Archiving and UnArchiving Variables Archiving lets you store data, programs, or other variables to the user data archive (ARC) where they cannot be edited or deleted inadvertently. Archiving also allows you to free up RAM for variables that may require additional memory.
  • Page 111 Archive? UnArchive? Variable Type Names (yes/no) (yes/no) Graph GDB1, GDB2,... databases Graph pictures Pic1 Pic2 Pic9 Pic0 Strings Str1 Str2 . . . Str9 Str0 Tables TblStart TblInput applicable Apps Applications see Note above AppVars Application variables Groups see Note above Variables with minX...
  • Page 112 Note: If there is not enough space, unarchive or delete variables as necessary. Be aware that when you unarchive a variable, not all the memory associated with that variable in user data archive will be released since the system keeps track of where the variable has been and where it is now in RAM.
  • Page 113 Select to display the 2:Mem Mgmt/Del MEMORY menu. MANAGEMENT/DELETE Select to display the menu. 4:List LIST Press Í to archive . An asterisk will appear to the left of indicate it is an archived variable. To unarchive a variable in this screen, put the cursor next to the archived variable and press Í.

  • Page 114: Resetting The Ti-84 Plus

    If you choose to reset Apps, all applications in archive memory will be erased. When you reset defaults on the TI-84 Plus, all defaults in RAM are restored to the factory settings. Stored data and programs are not changed.
  • Page 115 Defaults set Resetting Archive Memory When resetting archive memory on the TI-84 Plus, you can choose to delete from user data archive all variables, all applications, or both variables and applications. To reset all or part of user data archive memory, follow these steps.
  • Page 116 HOME Resetting All Memory When resetting all memory on the TI-84 Plus, RAM and user data archive memory is restored to factory settings. All nonsystem variables, applications, and programs are deleted. All system variables are reset to default settings.
  • Page 117 menu, press ~ ~ to display the From the RAM ARCHIVE ALL menu. Select to display the menu. 1:All Memory RESET MEMORY Read the message below the menu. RESET MEMORY screen, press Í. • To cancel the reset and return to the HOME •...

  • Page 118: Grouping And Ungrouping Variables

    Grouping and Ungrouping Variables Grouping Variables Grouping allows you to make a copy of two or more variables residing in RAM and then store them as a group in user data archive. The variables in RAM are not erased. The variables must exist in RAM before they can be grouped.
  • Page 119 For example, suppose some variables have been created in RAM, and selecting displays the following screen. 1:All- Press } and † to move the selection cursor (4) next to the first item you want to copy into a group, and then press Í. A small square will remain to the left of all variables selected for grouping.
  • Page 120 Ungrouping Variables Ungrouping allows you to make a copy of variables in a group stored in user data archive and place them ungrouped in DuplicateName Menu During the ungrouping action, if a duplicate variable name is detected in , the menu is displayed.
  • Page 121 Press } and † to move the selection cursor (4) next to the group variable you want to ungroup, and then press Í. The ungroup action is completed. Note: Ungrouping does not remove the group from user data archive. You must delete the group in user data archive to remove it. Memory and Variable Management...

  • Page 122: Garbage Collection

    When YES is selected, the TI-84 Plus will attempt to rearrange the archived variables to make additional room. Responding to the Garbage Collection Message •...
  • Page 123 An archived variable is stored in a continuous block within a single sector. Unlike an application stored in user data archive, an archived variable cannot cross a sector boundary. If there is not enough space left in the sector, the next variable is stored at the beginning of the next sector. Typically, this leaves an empty block at the end of the previous sector.
  • Page 124 If the MEMORY Screen Shows Enough Free Space Even if the screen shows enough free space to archive a MEMORY variable or store an application, you may still get a Garbage Collect? message or an message. ERR: ARCHIVE FULL When you unarchive a variable, the amount increases Archive free immediately, but the space is not actually available until after the next...
  • Page 125 Press Í to paste the command to the screen. HOME Press Í to display the message. Garbage Collect? Select to begin garbage collection. 2:Yes Memory and Variable Management...

  • Page 126: Err:archive Full Message

    ERR:ARCHIVE FULL Message Even if the screen shows enough free MEMORY space to archive a variable or store an application, you may still get an ERR: ARCHIVE message. FULL message may be displayed: ERR:ARCHIVE FULL • When there is insufficient space to archive a variable within a continuous block and within a single sector.

  • Page 127: Communication Link

    Getting Started: Sending Variables Getting Started is a fast-paced introduction. Read the chapter for details. Create and store a variable and a matrix, and then transfer them to another TI-84 Plus. On the home screen of the sending unit, Ë...
  • Page 128 Connect the graphing calculators with the USB unit-to-unit cable. Push both ends in firmly. On the receiving unit, press y 8 ~ to display the menu. Press to select RECEIVE . The message 1:Receive Waiting displayed and the busy indicator is on. On the sending unit, press y 8 to display the menu.

  • Page 129: Ti-84 Plus Link

    TI-84 Plus has a USB port to connect and communicate with another TI-84 Plus or TI-84 Plus Silver Edition. A USB unit-to-unit cable is included with the TI-84 Plus. The TI-84 Plus also has an I/O port using a I/O unit-to-unit cable to communicate with: •...
  • Page 130 Linking to the CBL/CBR System The CBL 2™ and the CBR™ are optional accessories that also connect to a TI-84 Plus with the I/O unit-to-unit cable. With a CBL 2 or CBR and a TI-84 Plus, you can collect and analyze real-world data.

  • Page 131: Selecting Items To Send

    (You do not need to select SEND Sends operating system updates to another G: SendOS TI-84 Plus Silver Edition or TI-84 Plus. You can not send the operating system to the TI-83 Plus product family. Selects all RAM and mode settings (no Flash H: Back Up...
  • Page 132 Select the menu item that describes the data type to send. The corresponding screen is displayed. SELECT Press } and † to move the selection cursor ( 4 ) to an item you want to select or deselect. Press Í to select or deselect the item. Selected names are marked with a 0.
  • Page 133 You can transfer variables (all types), programs, and Flash applications to another TI-84 Plus Silver Edition or TI-84 Plus. You can also backup the RAM memory of one unit to another. Note: Keep in mind that the TI-84 Plus has less Flash memory than the TI-84 Plus Silver Edition. •...
  • Page 134 Sending to a TI-83 Plus or TI-83 Plus Silver Edition You can send all variables from a TI-84 Plus to a TI-83 Plus or TI-83 Plus Silver Edition except Flash applications with new features, or programs with new features in them.

  • Page 135: Receiving Items

    Receiving from a TI-84 Plus Silver Edition or TI-84 Plus The TI-84 Plus Silver Edition and the TI-84 Plus are totally compatible. Keep in mind, however that the TI-84 Plus has less Flash memory than a TI-84 Plus Silver Edition.
  • Page 136 Receiving from a TI-83 You can transfer all variables and programs from a TI-83 to a TI-84 Plus if they fit in the RAM of the TI-84 Plus. The RAM of the TI-84 Plus is slightly less than the RAM of the TI-83.

  • Page 137: Backing Up Ram Memory

    You can also backup RAM memory and mode settings to a TI-84 Plus. To perform a RAM memory backup: Use a USB unit-to-unit cable to link two TI-84 Plus units, or a TI-84 Plus and a TI-84 Plus Silver Edition together.

  • Page 138: Error Conditions

    Plus Silver Edition • You attempt a data transfer from a TI-84 Plus to a TI-83 Plus, TI-83 Plus Silver Edition, TI-83, TI-82, or TI-73 with variables or features not recognized by the TI-83 Plus, TI-83 Plus Silver Edition, TI-83, TI-82, or TI-73.

  • Page 139: Functions And Instructions

    Appendix A: Functions and Instructions Functions return a value, list, or matrix. You can use functions in an expression. Instructions initiate an action. Some functions and instructions have arguments. Optional arguments and accompanying commas are enclosed in brackets ( [ ] ). For details about an item, including argument descriptions and restrictions, turn to the page listed on the right side of the table.
  • Page 140 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item … list1 list2 Performs a one-way ANOVA( list3 list20 analysis of variance for TESTS H:ANOVA( comparing the means of two to 20 populations. Returns the last answer. Moves the specified Archive variables from RAM to the 5:Archive user data archive memory.
  • Page 141 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item Œ npmt roundvalue Computes the balance at 1:Finance bal( npmt for an amortization CALC schedule using stored 9:bal( , æ, and values for and rounds the computation to roundvalue. numtrials Computes a cumulative binomcdf( DISTR probability at...
  • Page 142 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item † … Performs a test to confirm observedlist, GOF- Test( that sample data is from a TESTS expectedlist,df population that conforms GOFL Test( to a specified distribution. starttime Returns the number of checkTmr( seconds since you used checkTmr(...
  • Page 143 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item  value Returns the complex conj( conjugate of a complex 1:conj( number or list of complex numbers. † z Sets connected plotting Connected mode; resets all editor Connected graph-style settings to ç . †...
  • Page 144 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item y > matrix Returns a matrix of the cumSum( matrix cumulative sums of MATH 0:cumSum( elements. Each element in the returned matrix is a cumulative sum of a matrix column from top to bottom.
  • Page 145 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item y > matrix Returns determinant of det( matrix MATH 1:det( Sets diagnostics-off mode; DiagnosticOff DiagnosticOff , and are not displayed as regression model results. Sets diagnostics-on mode; DiagnosticOn DiagnosticOn , and are displayed as regression model results.
  • Page 146 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item value value Displays in DMS ANGLE format. † z Sets dot plotting mode; resets all editor graph- style settings to í . y < expression expression Draws (in terms DrawF DRAW ) on the graph.
  • Page 147 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item Converts the contents of a String(Y= ,Str to a string and String( stores it in string string Converts to an expr( expr( expression and executes … Xlistname Fits an exponential ExpReg Ylistname freqlist regequ...
  • Page 148 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item  expression variable Returns the value of fMax( variable MATH where the local lower upper tolerance expression 7:fMax( maximum of lower occurs, between upper , with specified tolerance  expression variable Returns the value of fMin( variable...
  • Page 149 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item Ü Computes the Û numerator df pdf( denominator df distribution probability DISTR Ü lowerbound pdf( between upperbound for the numerator df specified (degrees of freedom) and denominator df  value Displays a real or complex Frac number, expression, list, MATH...
  • Page 150 †  variable ,portfla variable Gets contents of GetCalc( on another TI-84 Plus and variable 0:GetCalc( stores it to on the receiving TI-84 Plus. By default, the TI-84 Plus uses the USB port if it is connected.
  • Page 151 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item integer Returns a string of the getDtStr( current date in the format getDtStr( integer specified by where: 1 = M/D/Y 2 = D/M/Y 3 = Y/M/D †  Returns the key code for getKey the current keystroke, or 7:getKey...
  • Page 152 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item † y . Turns off grid format. GridOff GridOff † y . Turns on grid format. GridOn GridOn † z Sets graph-table vertical split-screen mode. † z Sets horizontal split- Horiz screen mode.
  • Page 153 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item † y - Sets table to generate IndpntAuto independent-variable Indpnt: Auto values automatically. †  Displays graph. Input 1:Input †  variable Prompts for value to store Input variable text variable Input "...
  • Page 154 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item  value Returns the integer part iPart( of a real or complex 3:iPart( number, expression, list, or matrix. Œ CFList CFFreq Returns the interest rate 1:Finance irr( at which the net present CALC 8:irr( value of the cash flow is...
  • Page 155 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item y < Erases a line from ( Line( DRAW to ( 2:Line( … Fits a linear regression LinReg(a+bx) Xlistname Xlistname CALC model to Ylistname freqlist Ylistname 8:LinReg(a+bx) with frequency regequ freqlist , and stores the regression equation to regequ...
  • Page 156 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item … Xlistname Fits a logarithmic LnReg Ylistname freqlist regression model to CALC Xlistname Ylistname regequ 9:LnReg freqlist with frequency and stores the regression regequ equation to « value Returns logarithm of a log( real or complex number, expression, or list.
  • Page 157 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item value,list Returns a real or complex max( value MATH list of the larger of list 2:max( each element. list freqlist list Returns the mean of mean( freqlist MATH with frequency 3:mean( list freqlist list...
  • Page 158 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item  value list Returns a list of the value combinations of list 3:nCr taken each element in at a time.  list value Returns a list of the combinations of each list value 3:nCr...
  • Page 159 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item  valueA valueB Returns the number of valueA permutations of valueB 2:nPr taken at a time.  value list Returns a list of the value permutations of list 2:nPr taken each element in at a time.
  • Page 160 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item †  value value Displays ; suspends Pause program execution until you press Í. 8:Pause † y , type Xlistname Defines , or Plot Plot Ylistname mark type STAT PLOTS Scatter xyLine 1:Plot1- Xlistname...
  • Page 161 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item Computes a cumulative poissoncdf( DISTR probability at for the D:poissoncdf( discrete Poisson distribution with specified mean m. Computes a probability at poissonpdf( DISTR for the discrete Poisson C:poissonpdf( distribution with the specified mean m.
  • Page 162 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item † … Computes a one- 1-PropZTest( alternative drawflag TESTS proportion test. alternative 5:1-PropZTest( is <; alternative is ƒ; alternative is >. drawflag draws results; drawflag calculates results. † … Computes a two- 2-PropZTest( alternative drawflag...
  • Page 163 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item y < column Draws pixel at Pxl-On( column ); 0   62 POINTS column 4:Pxl-On( and 0   94. y < column Returns 1 if pixel ( pxl-Test( column POINTS ) is on, 0 if it is off;...
  • Page 164 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item  lower,upper Generates and displays a randInt( ,numtrials random integer within a lower range specified by 5:randInt( upper integer bounds for a specified number of numtrials trials y > rows columns Returns a random matrix randM( rows...
  • Page 165 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item y > matrix Returns the row-echelon ref( matrix form of a MATH A:ref( †  condition commands Executes until :Repeat commands condition is true. 6:Repeat :End commands †  Returns to the calling Return program.
  • Page 166 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item Returns q, given ANGLE rectangular coordinates or a list of rectangular coordinates. † … Ü listname1 Performs a two-sample 2-Samp Test Û test. alternative listname2 freqlist1 TESTS < Ü alternative freqlist2 alternative E:2-Samp Test...
  • Page 167 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item † … Computes a two-sample 2-SampTTest alternative alternative TESTS test. < pooled drawflag alternative 4:2-SampTTest is ƒ; alternative pooled (Summary stats input) > pooled pools variances; does not pool variances. drawflag draws results;...
  • Page 168 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item Xlistname Selects one or more Select( Ylistname specific data points from a 8:Select( scatter plot or xyLine plot (only), and then store•s the selected data points Xlistname to two new lists, Ylistname †...
  • Page 169 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item … Removes all list names SetUpEditor from the stat list editor, EDIT and then restores list 5:SetUpEditor names through columns through … listname1 Removes all list names SetUpEditor listname2 from the stat list editor, EDIT listname20 then sets it up to display...
  • Page 170 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item lowerbound Draws the density Shade_t( upperbound function for the Student-t DRAW 2:Shade_t( distribution specified by degrees of freedom df, and shades the area lowerbound between upperbound † z Sets mode to graph Simul functions simultaneously.
  • Page 171 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item keylistname Sorts elements of SortA( keylistname dependlist1 dependlist2 in ascending dependlist n 1:SortA( order, then sorts each ..., dependlist as a dependent list. listname listname Sorts elements of SortD( in descending order. 2:SortD( keylistname depen...
  • Page 172 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item string begin length Returns a string that is a sub( string sub( subset of another begin length from list start Returns the sum of sum( list start elements of from MATH 5:sum( š...
  • Page 173 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item † y . Sets sequence graphs to Time plot with respect to time. Time seconds Converts seconds to units timeCnv( of time that can be more timeCnv easily understood for evaluation. The list is in {days,hours,minutes,seconds} format.
  • Page 174 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item Ú æ Œ Computes the future 1:Finance tvm_FV value. CALC 6:tvm_FV Œ æ[ Ú Computes the annual 1:Finance tvm_ interest rate. CALC æ 3:tvm_ Œ Ú[ æ Computes the number of 1:Finance tvm_ payment periods.
  • Page 175 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item list freqlist Returns the variance of variance( list the elements in with MATH freqlist 8:variance( frequency y < Draws a vertical line at Vertical DRAW 4:Vertical † y . Sets sequence graphs to vwAxes plot on the x-axis and...
  • Page 176 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item † … listname Computes a confidence ZInterval freqlist confidence level TESTS interval. 7:ZInterval (Data list input) † … Computes a confidence ZInterval confidence level TESTS interval. 7:ZInterval (Summary stats input) † q Magnifies the part of the Zoom In graph that surrounds the...
  • Page 177 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item † q Adjusts the ZSquare window settings so that ZOOM 5:ZSquare each pixel represents an equal width and height in the coordinate system, and updates the viewing window. † q Replots the functions ZStandard immediately, updating ZOOM...
  • Page 178 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item value value ¡ Interprets Degrees notation: ANGLE degrees; designates ¡ degrees in DMS format. angle Interprets angle Radian: ANGLE radians. y > Returns a matrix in which matrix Transpose: each element (row, MATH column) is swapped with the corresponding...
  • Page 179 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item valueA valueB Returns 1 if Equal: valueA valueB TEST . Returns 0 valueA valueB valueA ƒ valueB can be real or complex numbers, expressions, lists, or matrices. Not equal: Returns 1 if valueA valueB valueA...
  • Page 180 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item — Returns 1 divided by a real value Inverse: or complex number or expression. — list Returns 1 divided by list Inverse: elements. — matrix Returns inverted. matrix Inverse: ¡ value Returns multiplied value...
  • Page 181 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item value Square root: ‡ Returns square root of a real or complex number, expression, or list. ¯ valueA Multiplication: Returns times ä valueA valueB valueB ¯ value Multiplication: Returns times each ä...
  • Page 182 Function or Key or Keys/Menu Instruction/Arguments Result or Screen/Item à Concatenation: Concatenates two or string1 string2 more strings. ¹ valueB Subtraction: Subtracts from valueA valueB valueA ¹ list Subtraction: Subtracts elements value list value from ¹ value list Subtraction: Subtracts from list value...

  • Page 183: Reference Information

    Appendix B: Reference Information Variables User Variables The TI-84 Plus uses the variables listed below in various ways. Some variables are restricted to specific data types. and q are defined as real or complex numbers. The variables through , q, and You may store to them.
  • Page 184 System Variables The variables below must be real numbers. You may store to them. Since the TI-84 Plus can update some of them, as the result of a , for ZOOM example, you may want to avoid using these variables to store nongraphing data.

  • Page 185: Statistics Formulas

    Statistics Formulas This section contains statistics formulas for the Logistic SinReg Ü regressions, , and ANOVA 2-Samp Test 2-SampTTest Logistic The logistic regression algorithm applies nonlinear recursive least-squares techniques to optimize the following cost function: ⎛ ⎞ ∑ ---------------------- - y –...
  • Page 186 The mean squares (MS) that make up Ü are: FactorSS ------------------------ FactorMS Factordf ErrorSS --------------------- ErrorMS Errordf The sum of squares (SS) that make up the mean squares are: ∑ FactorSS x – ∑ ErrorSS 1 – The degrees of freedom df that make up the mean squares are: Ü...
  • Page 187 Ü σ > σ for the alternative hypothesis Samp Test α ∫ – – Ü σ < σ for the alternative hypothesis Samp Test ∫ – – Ü for the alternative hypothesis s ƒ s . Limits must satisfy Samp Test the following: ∞...
  • Page 188 otherwise: – – ------------------------------------------------------------------ - ---- - ---- - Sx – and Sxp is the pooled variance. Appendix B: Reference Information...

  • Page 189: Financial Formulas

    Financial Formulas This section contains financial formulas for computing time value of money, amortization, cash flow, interest-rate conversions, and days between dates. Time Value of Money × ] 1 – ƒ where: PMT C/Y ÷ P/Y (.01 × I%) ÷ C/Y compounding periods per year payment periods per year interest rate per year...
  • Page 190 where: i = 0 – i × ---- - --------------------------- - – where: i ƒ 0 – PV ÷ where: i = 0 × × PMT G PMT G × ----------------------- - FV ------------------ - ----------------------- - – – where: i ƒ 0 –...
  • Page 191 then: bal( ) bal pmt2 ΣPrn( ) ) bal pmt1 bal pmt2 – ΣInt( ) ) RND PMT × ΣPrn( ) pmt2 pmt1 – – where: RND = round the display to the number of decimal places selected RND12 = round to 12 decimal places Balance, principal, and interest are dependent on the values of æ, and pmt1 and pmt2.
  • Page 192 = .01 × Eff where: x = effective rate = compounding periods = nominal rate Days between Dates With the function, you can enter or compute a date within the dbd( range Jan. 1, 1950, through Dec. 31, 2049. Actual/actual day-count method (assumes actual number of days per month and actual number of days per year): dbd( (days between dates) = Number of Days II - Number of Days I = (Y1-YB) ×...

  • Page 193: Important Things You Need To Know About Your Ti-84 Plus

    Important Things You Need to Know About Your TI-84 Plus TI-84 Plus Results There may be a number of reasons that your TI-84 Plus is not displaying the expected results; however, the most common solutions involve order of operations or mode settings. Your calculator uses an Equation...
  • Page 194 TI-84 Plus and transfer any file to the disabled calculator, or use TI Connect™ to download a file from your computer to your TI-84 Plus. To transfer a file from another TI-84 Plus:...
  • Page 195 Apps let you customize your calculator for peak performance in specific areas of study. You can find apps for the TI-84 Plus at the TI Online Store at education.ti.com.

  • Page 196: Error Conditions

    Error Conditions When the TI-84 Plus detects an error, it returns an error message as a menu title, such as . This table contains ERR:SYNTAX ERR:DOMAIN each error type, possible causes, and suggestions for correction. The error types listed in this table are each preceded by...
  • Page 197 L1 and L2 do not match. DIVIDE BY 0 • You attempted to divide by zero. This error is not returned during graphing. The TI-84 Plus allows for undefined values on a graph. • You attempted a linear regression with a vertical line.
  • Page 198 Error in Xmit • The TI-84 Plus was unable to transmit an item. Check to see that the cable is firmly connected to both units and that the receiving unit is in receive mode.
  • Page 199 • You attempted to reference a variable or function that was transferred from the TI.82 and is not valid for the TI-84 Plus For example, you may have transferred to the TI-84 Plus from the TI.82 and then tried to reference it.
  • Page 200 TI-84 Plus. (See the instructions under Important Things to Know about your TI-84 Plus, earlier in this chapter.) MEMORY Memory is insufficient to perform the instruction or function.
  • Page 201 NONREAL ANS mode, the result of a calculation yielded a Real complex result. This error is not returned during graphing. The TI-84 Plus allows for undefined values on a graph. OVERFLOW You attempted to enter, or you have calculated, a number that is beyond the range of the graphing calculator.
  • Page 202 TI-84 Plus. The arguments are shown in italics. The arguments in brackets are optional and you need not type them. You must also be sure to separate multiple arguments with a comma (,). For example...
  • Page 203 Window variables are too small or too large to graph correctly. You may have attempted to zoom in or zoom out to a point that exceeds the TI-84 Plus’s numerical range. ZOOM • A point or a line, instead of a box, is defined in ZBox.

  • Page 204: Accuracy Information

    Accuracy Information Computational Accuracy To maximize accuracy, the TI-84 Plus carries more digits internally than it displays. Values are stored in memory using up to 14 digits with a two- digit exponent. • You can store a value in the window variables using up to 10 digits...
  • Page 205 on the menu are calculated with a minimum maximum CALCULATE tolerance of 1âL5; ‰ is calculated at 1âL3. Therefore, the result f(x)dx displayed may not be accurate to all eight displayed digits. For most functions, at least five accurate digits exist. For , and fMin( fMax(...

  • Page 207: Service And Warranty Information

    For product (hardware) service Customers in the U.S., Canada, Mexico, Puerto Rico and Virgin Islands: Always contact Texas Instruments Customer Support before returning a product for service. All other customers: Refer to the leaflet enclosed with this product (hardware) or contact your local Texas Instruments retailer/distributor.

  • Page 208: Texas Instruments (Ti) Warranty Information

    Customers in the U.S. and Canada Only One-Year Limited Warranty for Commercial Electronic Product This Texas Instruments ("TI") electronic product warranty extends only to the original purchaser and user of the product. This TI electronic product is warranted to the original pur- Warranty Duration.
  • Page 209 Except as expressly provided in the One-Year Limited Warranty for this product, Texas Instruments does not promise that facil- ities for the repair of this product or parts for the repair of this product will be available.

  • Page 210: Battery Information

    SR44SW or 303 silver oxide backup battery. The silver oxide battery provides auxiliary power to retain memory while you replace the AAA batteries. When the battery voltage level drops below a usable level, the TI-84 Plus: Displays this message when Displays this message when you you turn on the unit.
  • Page 211 • Do not place nonrechargeable batteries in a battery recharger. • Properly dispose of used batteries immediately. Do not leave them within the reach of children. • Do not incinerate or dismantle batteries. Replacing the Batteries To replace the batteries, follow these steps. Turn off the graphing calculator.

  • Page 212: In Case Of Difficulty

    If the graphing calculator does not seem to work at all, be sure the alkaline batteries are fresh and that they are installed properly. If the TI-84 Plus does not function even though you are sure that the batteries are fresh, you can try manually resetting it.
  • Page 213 Press and hold the É key for ten seconds. • • Replace the batteries. • Turn on the unit. When you reset your graphing calculator, the contrast sometimes changes. If the screen is faded or blank, adjust the contrast by pressing y and releasing } or †.
  • Page 214 Appendix C: Service and Warranty Information...

  • Page 215: Index

    Index Symbols Numerics ( - (degrees notation) 170 10^( (power of ten) 172 ( - (negation) 172 1-PropZInt (one-proportion z ( – (subtraction) 174 confidence interval) 153 ( ! (factorial) 169 1-PropZTest (one-proportion z test) ( ! Store 163 ( ! dim( (assign dimension) 137 1-Var Stats (one-variable statistics) ( # (not equal to) 171 ( $ ( (square root) 173...
  • Page 216 ANOVA( (one-way variance analysis) CBR™ 122 check memory 97 Ans (last answer) 100 checkTmr( (check timer) 134 applications chi-square cdf (c²cdf( ) 133 installing 53 chi-square pdf (c²pdf( ) 133 running 54 chi-square test (c²-Test) 133 Apps 99 Circle( (draw circle) 134 AppVars 99 Clear Entries 97 Archive 102...
  • Page 217 4Rect (to rectangular conversion) DependAsk 136 DependAuto 136 decimals to fractions 33 det( (determinant) 137 Equ4String( (equation-to-string determinant (det( ) 137 conversion) 139 determining data in lists 40 List4matr( (list-to-matrix DiagnosticOff 137 conversion) 147 DiagnosticOn 137 Matr4list( (matrix-to-list dim( (dimension) 137 conversion) 148 dimensioning a list or matrix 137 P4Rx(, P4Ry( (polar-to-...
  • Page 218 editing expressions 15 unit circle and trig curves 82 End 138 examples—Getting Started Eng (engineering notation mode) adding complex numbers 35 building tables 30 entering calculating linear regressions 43 alphabetic characters 5 calculating statistical variables 44 data into lists 38 changing FORMAT menu 13 expressions 7 changing mode settings 24...
  • Page 219 Get( (get data from CBL 2™ or CBR™) 142 Faceplates 8 GetCalc( (get data from TI-84 Plus) factorial (!) 34 FCC statement iii getDate, get current date 142 Fill( 139 getDtFmt, get date format 142 finding getDtStr( (get date string) 143...
  • Page 220 Input 145 to a TI-84 Plus Silver Edition or TI- installation instructions 84 Plus 129 Macintosh® 53 transmitting items 119 Windows® 53 two TI-84 Plus units 125 installing applications 53 LinReg(a+bx) (linear regression) 147 Installing New Faceplates 8 LinReg(ax+b) (linear regression) 147...
  • Page 221 minimum of a function (fMin( ) 140 minutes notation (') 174 Omit 112 mode menu 24 one-proportion z confidence interval changing settings 24 (1-PropZInt) 153 default settngs 24 one-proportion z test (1-PropZTest) mode settings a+bi (complex rectangular) 132 one-sample t confidence interval Connected (plotting) 135 (TInterval) 165 Degree (angle) 136...
  • Page 222 probability density function all memory 108 (normalpdf( ) 150 archive memory 107 prod( (product) 153 defaults 52 programming memory 107 name (prgm) 153 RAM memory 107 Prompt 153 Return 157 Pt-Change( 154 root (x$) 170 Pt-Off( 154 round( 157 Pt-On( 154 row+( 157 PwrReg (power regression) 154 rowSwap( 157...
  • Page 223 (tcdf( ) 164 from a TI-83 Plus Silver Edition or student-t distribution TI-83 Plus 129 probability density function from a TI-84 Plus Silver Edition or (tpdf( ) 165 TI-84 Plus 129 sub( (substring) 164 stopping 125 subtraction (–) 174...
  • Page 224 two-proportion z test (2-PropZTest) x$ (root) 170 two-sample F-Test formula 178 xor (Boolean) exclusive or operator two-sample t test formula 179 two-variable statistics (2-Var Stats) Y= Editor, clearing 31 UnArchive 102 ungrouping 110 ZBox 29 ungrouping variables 50 ZDecimal 29 user variables 175 ZInteger 29 uv/uvAxes (axes format) 166...

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