Answer: Option D is correct.
Explanation:
Since we have given that
the cost of tuition at Johnson Community College is $160 per credit hour
Let the credit hour be x
So ,the cost of tuition for x hours will be given by

Now, we have also given that each student has to pay $50 in fees .
So, $ 50 will be to the cost of tuition for x hours i.e.

So, the cost function C for x credit hours taken by each student will be given by
