Advertisement
Chapter 1 Ingredients of Change:
Functions and Linear Models
&
1.1 Fundamentals of Modeling
There are many uses for a function that is entered in the graphing list. Graphing the function
in an appropriate viewing window is one of these. Because you must enter all functions on one
line (that is, you cannot write fractions and exponents the same way you do on paper) it is
very important to have a good understanding of the calculatorÕs order of operations and to
use parentheses whenever they are needed.
1.1.1 ENTERING AN EQUATION IN THE GRAPHING LIST
(
GRAPH
F1
y(x)=
graphing list, and the output variables are called by the names y
to graph an equation you enter in the list, you must use x as the input variable.
If there are any previously entered equations that you will
no longer use, clear them out of the graphing list.
Suppose you want to graph A = 1000(1 + 0.05)
the input must be called x. Type x by pressing x-
TI 85 For convenience, we use the first, or y
in the graphing list. Enter the right hand side as
1000(1 + 0.05)^x
TI 86 For convenience, we use the first, or y
in the graphing list. Enter the right hand side as
1000(1 + 0.05)^x
,
,
and
Plot1
Plot2
not be darkened. If any of them are, use
are on the darkened plot name. Press
the name(s) not dark.
1.1.2 DRAWING A GRAPH
y(x)= list using x as the input variable before drawing a graph. We now draw the graph of
y = 1000(1 + 0.05)
B-5
) to access the graphing list. Up to 99 equations can be entered in t h e
at the top of the y(x)= list should
Plot3
ENTER
If you have not already done so, enter the equation in t h e
x
.
, y
1
Position the cursor on the line
containing the equation and
press
t
. Because we intend to graph this equation,
or
(
) , not the times sign
VAR
F1
x
, location
1
, location
1
until you
to make
Copyright © Houghton Mifflin Company. All rights reserved.
Press
, etc. When you intend
2
or
(
) .
CLEAR
F4
DELf
.
Advertisement
