Operation Manual

Chapter 17: Activities 307
The fine (Y) as a function of kilometers per hour (X) is:
which simplifies to:
Procedure
1. Press z. Select Func and Classic.
2. Press o. Turn off all functions and stat plots. Enter the
Y= function to describe the fine. Use the
TEST menu operations to define the piecewise function. Set the graph style for Y1 to í (Dot-Thick).
3. Press p and set Xmin=L2, Xscl=10, Ymin=L5, Yscl=10, @X=.5 and TraceStep=1. Ignore Xmax
and
Ymax; they are set in step 4.
4. Press y 5 to return to the home screen. Store 5 to @Y. @X and @Y are on the VARS Window X/Y
secondary menu. @X and @Y specify the horizontal and vertical distance between the centers of
adjacent pixels. Integer values for @
X and @Y produce nice values for tracing.
5. Press r to plot the function. At what speed does the ticket exceed 250?