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B-22
TI-85/TI-86 Graphing Calculators
TI-86 Position the cursor over the L
the first column.
Replace the L
1
pressing
(
F3
NAMES
then press
–
Instead of an actual year, the input now represents
the number of years after 1992.
1.4.5 PLOTTING DATA
data. Therefore, you should delete them or turn them off before drawing a scatter plot.
Access the y(x)= graphing list. If any entered function
is no longer needed, delete it with
it with
CLEAR
If you want the function to remain but do not want it to
graph, position the cursor in that function location and
press
(
F5
SELCT
To graph data on the TI-85:
The TI-85 command Scatter L
an appropriate RANGE before using this command. Program STPLT found in the TI-85/TI-86
Appendix automates this task.
Press
and then press
PRGM
Find the name STPLT (press
Press
to remove the menu from the bottom
CLEAR
of the screen for a better view.
A scatter plot is drawn of the data with the L
input data and the L
¥ Program STPLT sets the x and y-axis tick marks to 0 so they do not interfere with your
view of the scatter plot.
¥
Because the dots the calculator uses to plot data are sometimes difficult to see when
overdrawing the model of best fit, the program places a small box around each data
point. (The boxes may appear a slightly different size with different screen settings.)
¥ Even though the TI-85 generally allows you to call lists by any names you want, you must
enter the input data in the list named L
using program STPLT.
¥ Lists L
and L
1
¥ It is not possible to trace a scatter plot drawn on the TI-85.
at the top of
1
- 1992 values by
values with L
1
) , the menu key under L
1992
.
ENTER
Any functions you have in the y(x)= list will graph when you plot
(
F4
.
) .
, L
draws a scatter plot of L
1
2
(
F1
NAMES
if necessary).
MORE
data as the output data.
2
must be of the same length or an error message results.
2
, and
1
) or clear
DELf
versus L
1
Press the F-key corresponding
) .
to the location of STPLT to
run the program.
data as the
1
and the output data in the list named L
1
Copyright © Houghton Mifflin Company. All rights reserved.
A Òturned offÓ function.
. However, you must set
1
when
2
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