Mathematics, 23.03.2021 03:50 LilFreaky666

Suppose that the credit remaining on a phone card (in dollars) is a linear function of the total calling time (in minutes). When graphed, the function gives a line with a slope of -0.16 . See the figure below. There is $33.20 in credit remaining on the card after 20 minutes of calls. How much credit was there after 13 minutes of calls?

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Suppose that the credit remaining on a phone card (in dollars) is a linear function of the total cal...