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Chapter 17: Activities 482
3. Press p and set Xmin=L2, Xscl=10, Ymin=L5, and Yscl=10. Ignore Xmax and
Ymax; they are set by @X and @Y in step 4.
4. Press y 5 to return to the home screen. Store
1 to @X, and then 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?