User Manual

Chapter 17: Activities 318
4. Press s to graph the equations. Watch closely as they are plotted. Notice that the ball
and the ferris wheel passenger appear to be closest where the paths cross in the top-right
quadrant of the ferris wheel.
5. Press p. Change the viewing window to concentrate on this portion of the graph.
6. Press r. After the graph is plotted, press ~ to move near the point on the ferris wheel
where the paths cross. Notice the values of
X, Y, and T.
7. Press † to move to the path of the ball. Notice the values of X and Y (T is unchanged). Notice
where the cursor is located. This is the position of the ball when the ferris wheel passenger
passes the intersection. Did the ball or the passenger reach the intersection first?
You can use r to, in effect, take snapshots in time and explore the relative behavior of
two objects in motion.
Tmin=1
Tmax=3
Tstep=.03
Xmin=0
Xmax=23.5
Xscl=10
Ymin=10
Ymax=25.5
Yscl=10