Answer:
$8/hour
Explanation:
You are given 3 points.
You need to use two of them to find the slope.
The slope is the rate of change.
Let's use points (1, 28) and (2, 36).
slope = (difference in y)/(difference in x)
slope = (y_2 - y_1)/(x_2 - x_1)
slope = (36 - 28)/(2 - 1)
slope = 8/1
slope = 8
Answer: The rate of change is $8/hour.