The graph below shows a company's profit f(x), in dollars, depending on the price of erasers x, in dollars, sold by the company:
300 + (x)
270
240
210
180
150
120 +
90
80
30 H
X
1 2 3 4
67
9 10
soft
Part A: What do the x-intercepts and maximum value of the graph represent? What are the intervals where the function is increasing and decreasing, and what do they represent about
the sale and profit? (4 points)
Part B: vhat is an approximate average rate of change of the graph from x = 1 to x = 4, and what does this rate represent? (3 points)
Part C: Describe the constraints of the domain (3 points)