Answer:
The equation is: 
Step-by-step explanation:
Given
Initial = 52000
Rate = 8000 each year
Required
Determine the equation of the graph
The equation can be determined using.

We used minus (-) because, the amount reduces as the student pays.
Let


So, we have:

Substitute values for Initial and Rate


Express as a function:

The answer is -6 -/+ 4i. Hope this helps.
Answer:
<h2><em> -12y² + 72y</em></h2>
Step-by-step explanation:
Use the distributive property: <em>a(b + c) = ab + ac</em>
<em>-12y(y - 6) = (-12y)(y) + (-12y)(-6) = -12y² + 72y</em>