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28-10-2022
Mathematics

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A plumber charged $110 for a three-hour job and $160 for a five-hour job. What’s the average rate of change in terms of dollars per hour

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28-10-2022

The average rate of change is the ratio between the change of each magnitues. The following formula helps to calculate it

[tex]r=\frac{\Delta y}{\Delta x}[/tex]

Using the given information, we have

[tex]r=\frac{160-110}{5-3}=\frac{50}{2}=25[/tex]

Therefore, the average rate of change is $25 per hour.

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