A tennis ball is tossed into the air. The height, h(t), in feet, of the tennis ball is a function of time, t, in seconds, as shown in the table below. What is the average rate of change of h on the interval 1 < t < 2.5?
0 0
0.5 20
1 32
1.5 36
2 32
2.5 20
3 0
