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Evaluate y
at x = 7 by recalling the previous entry with
1
(
2nd
ENTER
ENTRY
and typing over the 5, and press
Repeat the process to evaluate y
&
1.2 Functions and Graphs
When you are asked to estimate or approximate an output or an input value, you can use your
calculator in the following ways:
¥
tracing a graph
¥
close values obtained from a table of function values
When you are asked to find or determine an output or an input value, you should use your
calculator in the following ways:
¥
evaluating an output on the home screen
¥
find a value using the AUTO or ASK features of the table
¥
determine an input using the solver
1.2.1 DETERMINING OUTPUTS
home screen, as discussed in 1.1.7. You can also evaluate functions using the calculatorÕs
TABLE. (On the TI-85, the table is accessed with program TABLE.) When you use the table,
you can ask for specific output values corresponding to the inputs you enter or generate a list
of input values that begin with TblMin and differ by DTbl and their corresponding outputs.
LetÕs use the TABLE to determine the output of the function v(t) = 3.622(1.093)
Press
GRAPH
F1
TI-85 Note that when using program TABLE, any
functions you want to evaluate should be in locations
y
, y
, and so forth. That is, donÕt leave an empty
1
2
function location in the y(x)= list. (Program TABLE
can be found in the TI-85/86 Appendix.)
An alphabetical list of the programs that you have
entered in your TI-85 appears on the bottom menu.
Find the name TABLE (press
Press the F-key corresponding to the location of the
program and
ENTER
Since we only want v(85), enter 2 for ASK and type
85 at the x=? prompt.
Copyright © Houghton Mifflin Company. All rights reserved.
) , edit the 5 to 7 by pressing
ENTER
at x = 10.
1
Function outputs can be determined by evaluating on t h e
(
) , clear any functions, and enter 3.622(1 .093)^X in location y
y(x)=
if necessary).
MORE
to ÒrunÓ the program.
.
(Sections 1.1.5, 1.1.6)
(End of Section 1.2.2)
(Section 1.1.7)
(Section 1.2.1)
(Section 1.2.2)
Press
PRGM
(
F1
NAMES
B-11
Chapter 1
t
when t =85.
. Exit.
1
and then press
) .
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