Question

In 2010, the number of clown costumes sold at a single costume shop was 13. By 2015, that number had grown to 22. Assuming a constant increase in clown costume sales, calculate the average rate of change from 2010 to 2015. Round your answer to the nearest tenth.

Answer 1

We will have that the average rate of change will be:

$m=\frac{22-13}{2015-2010}\Rightarrow m=1.8$

So, the average rate of change was 1.8 clown costumes per year.