Monthly cost of long-distance phone plan

Reference no: EM13119746

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

The monthly cost for 53 minutes of calls is 16.56 . What is the monthly cost for 45 minutes of calls?

Reference no: EM13119746

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