Finding average rate of change

Find the average rate of change of a function over a given interval.

Problem

Consider the function h whose graph is shown below.
What is the average rate of change of h over the interval 5, is less than or equal to, t, is less than or equal to, 9?
Give an exact number.
space
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, p, i or 2, slash, 3, space, p, i
On which interval does h, left parenthesis, t, right parenthesis have an average rate of change of zero?
Please choose from one of the following options.