Question

kathleen recently borrowed a new book from the library. the table below shows her progress since she started reading.

what has been the average hourly change in the number of pages read by kathleen over the past 4 hours?

36
40
45
96

Explanation:

Step1: Find the total change in pages

The formula for average rate of change is $\frac{\text{Change in pages}}{\text{Change in hours}}$. The number of pages read at hour $0$ is $0$ and at hour $4$ is $158$. So the change in pages is $158 - 0=158$.

Step2: Find the change in hours

The change in hours is $4 - 0 = 4$.

Step3: Calculate the average hourly change

Using the formula $\frac{\text{Change in pages}}{\text{Change in hours}}$, we substitute the values: $\frac{158}{4}=39.5\approx40$.

Answer:

40