Question

The points (1, 5), (5, 10), (7, 8) and (8, 1) are on the graph of the function p. Which expression gives the average rate of change of the function p on 5 ≤ x ≤ 8?

Answer 1

The answer is option c.

Answer 2

Average rate of change is the same as finding slope between a line on a non- linear function.
Using the ordered pairs
(5,10) and (8,1)
(10-1)/(5-8) = 9/-2 = -9/2