The graph attached shows a company's profit f(x), in dollars, depending on the price of erasers x, in dollars, sold by the company: 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?  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?  Part C: Describe the constraints of the domain.

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Exponential Growth Model

The relation that represents an exponential function is: