Linear Functions And Models; Entering Data - Texas Instruments TI-84 Plus Manual

TI-83, TI-83 Plus, TI-84 Plus Guide
Press and, using one of the arrow keys, move the cursor
Y=
until it covers the darkened = in
press until the cursor covers the darkened = in
▼
.
ENTER Y1
A function is turned off when the equals sign in its location in the graphing list is not dark. To
turn a function back on, simply reverse the above process to make the equal sign for the func-
tion dark. When you draw a graph, the TI-83 graphs of all functions that are turned on. You
may at times wish to keep certain functions entered in the graphing list but not have them graph
and not have their values shown in the table. Such is the case in this illustration.
We now return to checking to see that
Choose the
ASK
several different values for both
access the table setup with
the cursor to
ASK
Press
2ND
the function is to be evaluated, and press
We see that because all these outputs are the same for each
function, you can be fairly sure that your answer is correct.
Why does
ERROR
large! The computational limits of the calculator have been exceeded when x = 57. This is an
OVERFLOW ERROR.
.

1.2 Linear Functions and Models

This portion of the Guide gives instructions for entering real-world data into the calculator and
finding familiar function curves to fit that data. You will use the beginning material in this
section throughout all the chapters in Calculus Concepts.
CAUTION: Be very careful when you enter data in your calculator because your model and
all of your results depend on the values that you enter! Double check your entries.

ENTERING DATA

1.2.1
Calculus Concepts:
Year
Tax (dollars)
Press
STAT 1 [EDIT]
and but you can access the other 3 lists (
L3)
name and pressing
setup instructions on page A-1 of this Guide.
Copyright © Houghton Mifflin Company. All rights reserved.
. Press
Y1
and are now turned off.
Y2
setting in the table setup so that you can check
and
Y3
2ND WINDOW (TBLSET).
in the location and press
Indpnt:
, type in the x-value(s) at which
GRAPH (TABLE)
appear in the table when x = 57? Look at the value when x = 20; it is very
We illustrate data entry using the values in Table 1.11 in Section 1.2 of
1999 2000
2532 3073
to access the 6 lists that hold data. You see only the first 3 lists, (
several times. If you do not see these list names, return to the statistical
►
. Then,
ENTER
. Press
Y2
and represent the same function.
Y3 Y4
. Recall that you
Y4
Move
ENTER .
after each one.
ENTER
2001 2002
3614 4155
and ) by having the cursor on the list
L4, L5, L6
2003 2004
4696 5237
L1, L2,
17