Answer:
Answer explained below.Step-by-step explanation:
A.
The x-intercepts represent a zero profit and the maximum value of the graph represents the maximum profit.
The function increases up till the vertex and decreases after it which means that the profit increases as it reaches the peak at the vertex
and decreases after the vertex up till it reaches zero. The profits are negative on the left of the first zero and on the right of the second zero.
B.
An approximate average rate of change of the graph from x = 3 to x = 5 represents the reduction in profit from 3 to 5 .
C.
Simply, the domain is constrained by x = 0 .
We are obliged at x = 6 .
This is because we have to avoid a negative profit.