Answer:
y = 35x+200
Step-by-step explanation:
The $200 is a constant, and the $35 PER credit hour makes it dependent on x.
Let's say the function for the discount is f and the function for the coupon is g
f(x)= 0.1x
g(x)= x-150
If you want to the the discount then the coupon, your composition function would look like this:
f(g(x))=0.1(x-150)
Hope this helps!
A better estimate would be something that is closer to one you had before...