Texas Instruments TI-83 Plus Manual Book page 127

Chapter 5: Linear Systems
Section 1: Using Graphs & Tables
³ Try-It!é on Your TI-83 Plus or TI-73
You will:
•
Graph two lines of a system of equations.
•
Use r to locate the intersection of the lines.
•
Use y 0 and y - to locate the exact solution of the system of equations.
Find the solution of the system:
Notice that these equations are already in the form of y = mx + b. They are in the form to enter
into your calculator.
To Do This
1. Exit the Topics in Algebra 1
application and clear the Home
screen.
2. First, enter L4X + 2 as Y1 and
2X N 2.5 as Y2 in the Y= editor.
Note: See ³TIp™ 3: Graphing a Function in
the Standard Window for more information.
Note: On the TI-73, use I rather than
„.
3. Select the Zoom Decimal viewing
window. The graph displays.
Remember: You have to adjust the viewing
window depending on the system of
equations. You can see the intersection of
the lines in the ZDecimal window for this
example.
Topics in Algebra 1
Name
Date
Y1 = L4X + 2
Y2 = 2X N 2.5
Press
y 5
á â '
EXIT
o '
Ì „ Ã
4
† '
„ ¹
2
TI-83 Plus:
q
4:ZDecimal
TI-73:
q
8:ZDecimal
© 2001, 2002 Texas Instruments
Display
2
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2 5
Student Worksheet
(TI.83 Plus shown)
5-4