The graph below shows a company's profit f(x), in dollars, depending on the price of
erasers x, in dollars, being sold by the company
300 + f(x)
270
240
210
180
150
120
n
90 +
60
30 H
-
2 3
5 6 7
9 10
-30
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? (6 points)
Part B: What is an approximate average rate of change of the graph from x = 1 to x = 4,
and what does this rate represent? (4 points)
(10 points)