According to the proportional relationship shown by the graph, the rate of change is of 13 dollars per hour.
What is a proportional relationship?
A proportional relationship is a function in which the output variable is given by the input variable multiplied by a constant of proportionality, that is:
y = kx
In which k is the constant of proportionality, which is also the rate of change.
Considering the graph, the rate of change, in dollars per hour, is given by:
k = 65/5 = 26/2 = 13.
More can be learned about proportional relationships at https://brainly.com/question/10424180
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