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Mathematics 17 Online
OpenStudy (anonymous):

Suppose that the monthly cost of a long-distance phone plan (in dollars) is a linear function of the total calling time (in minutes). When graphed, the function gives a line with a slope of 0.09 . See the figure below. The monthly cost for 31minutes of calls is $13.36. . What is the monthly cost for 26 minutes of calls?

OpenStudy (mertsj):

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