Work these exercises. (See Examples 2, 3, 10, and 11.)
Postal Rates Whenever postage rates change, some newspaper publishes a graph like this one, which shows the price of a first-class stamp from 2006-2016.
Let f be the function whose rule is
Explain why the graph in the figure is not the graph of the function. What must be done to the figure to make it an accurate graph of the functionf?
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