Graphing The Inverse Of A Function - Texas Instruments TI-80 Manual Book

Graphing the Inverse of a Function

You can use the parametric graphing feature of the TI.80 to graph the inverse
relation of any function by defining the function in Xã
Xä and Yä .
T T
Problem
Procedure
11-10 Applications
The function Y=.2X
form as X =T and Y
T
The inverse relation of the function can be expressed in
parametric form as X
3
ì2X+6 would be expressed as X
Y=.2X
Y =T.
T
Graph the function Y=.2X
Follow this procedure to solve the problem.
1. Select Param ,
2. Change the Window variable values.
Tmin=L10
Tmax=10
Tstep=.4
3. Enter the expressions to define the function in parametric
form.
X1î=T
Y1î=.2Tò–2T+6
4. Enter the expressions to define the inverse in parametric
form.
X2î=.2Tò–2T+6
Y2î=T
T
3
ì2X+6 can be expressed in parametric
3
ì2T+6.
=.2T
T
=F(T) and Y =T. For example,
T T
3
ì2X+6 and its inverse.
CONNECTED , and
Xmin=L15
Xmax=15
Xscl=1
and Yã and its inverse in
T
3
ì2T+6 and
=.2T
T
Simul modes.
Ymin=L9
Ymax=9
Yscl=5