Question

In-district students at a college pay $427 for 7 credit hours (units) of classes and $549 for 9 credit hours of classes. Find the average rate of change of the total cost of classes with respect to the number of credit hours of classes.The rate of change is: $___ per credit hour

Answer 1

$427 for 7 credit hours of classes

$549 for 9 credit hours of classes

Unit rate: cost: credit hours

So, we have to divide the cost by the number of hours:

427/7 = 61

549/9 = 61

The rate of change is: $61 per credit hour​