Answer
hours per chapter
Work Step by Step
To find the average rate of change, divide the time by the number of chapters read:
Average Rate = $\dfrac{18\text{ hours}}{6 \text{ chapters}}=3 \text{ hours per chapter}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.