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Question A

The graph below shows a company's profit f(x), in dollars, depending on the

price of pencils x, in dollars, sold by the company:

Graph of quadratic function f(x) having x intercepts at ordered pairs (-0,0) (10, 0) The vertex is at (5, 160)

Part 1: 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?

Part 2: What is an average rate of change of the graph from x = 2 to x = 5, and what does this rate represent?

Part 3: Describe the constraints of the domain.

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