The function f 1x2 = -8.6x + 275 represents the U.S.
Chapter 4, Problem 4.3.58(choose chapter or problem)
The function f 1x2 = -8.6x + 275 represents the U.S. average number of monthly calls (sent or received) per wireless subscriber and the function f 1x2 = 204.9x - 1217 represents the average number of text messages (sent or received) per wireless subscriber. For both functions, x is the number of years since 2000, and these functions are good for the years 20062010.Use your answer to Exercise 57 to predict the year in whichthe monthly calls and text messages are/were the same.
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