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Mathematics 16 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 (anonymous):

(13.36 - y ) / ( 31 - 26) = .09 Can you find y is monthly cost of 26-minute call?

OpenStudy (anonymous):

how do u do that?

OpenStudy (anonymous):

what is 31-26?

OpenStudy (anonymous):

then multiply by .09

OpenStudy (anonymous):

55.6??

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