Entering Data - Texas Instruments TI-89 Manual

TI 89-26
The results of our numerical and graphical investigations are confirmed by the algebraic
answers. Note that the TI-89 prints
1.5 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.
CAUTI ON: You need to name the data variable in the TI-89, and you are instructed below to
use the name
calcc
later will not properly execute. Also, be careful when you enter data in the TI-89 because the
model and all results depend on the values that are entered! Always check your entries.
1.5.1 ENTERI NG DATA
Year
Tax (in dollars)
Before beginning, clear out previous work with
Press
APPS 6 [Data/Matrix Editor] and choose 3 [New].
the settings shown to the right for the first two positions. Name
the variable by pressing
We use this variable name for all data in this Guide. See the
(
note above.)
CAUTION
Press
ENTER
shown to the right. These are the lists
that hold data. You can access many
other lists by highlighting the list name
and using
► .
In this Guide, we usually use list
any data values already in your lists, see Section 1.5.3 of this Guide and first delete any "old"
data. To enter data in the lists, do the following:
Position the cursor in the first location in list
data into list
c1
column, pressing
rather than a number prints, alpha-lock is still on. Press
release it.) Use the shortcut in the
values in .
c2
NOTE: After typing the sixth input value, 2001, use
of list and then press
c1
list by typing the entries from top to bottom in the
c2
each tax value. (
page 232 of the TI-89 Guidebook for other key combinations that scroll the data lists.)
undef
. Do not change or vary this name. If you do, the programs that you use
We illustrate data entry using the values in Table 1.46 in Section 1.5.
1996 1997
2532 3073
2nd alpha (a-lock)
until you see the screen
for the input data and list
c1
by typing the years from top to bottom in the
or after each entry. (If a letter
ENTER ▼
NOTE
►
to be in the first row of the
causes the cursor to jump to the bottom of the current column. See
▼
to mean undefined or does not exist.
1998 1999
3614 4155
HOME 2nd F1 [F6] 2 [NewProb] ENTER .
Choose
and type
c a l c c.
for the output data. If there are
c2
. Enter the input
c1
c1
to
alpha
below to enter the tax
to have the cursor go to the top
▲
column. Enter the output data into
c2
column, pressing
c2
Copyright © Houghton Mifflin Company. All rights reserved.
Chapter 1
2000 2001
4696 5237
or after
ENTER ▼