The graph below shows a company's profit f(x), in dollars, depending on the price of goods x, in dollars, being sold by the company Part A: What do the x-intercepts and maximum value of the graph represent?

Part B: What are the intervals where the function is increasing and decreasing, and what do they represent about the sale and profit?

Part C: What is an approximate average rate of change of the graph from x = 1 to x = 3, and what does this rate represent?

overpriced

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20%

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answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

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