SOLUTION: 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
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-> SOLUTION: 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
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Question 223142: 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
There is $29.00 in credit remaining on the card after 25 minutes of calls. How much credit was there after 18 minutes of calls?
You can put this solution on YOUR website! 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
There is $29.00 in credit remaining on the card after 25 minutes of calls. How much credit was there after 18 minutes of calls?
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Credit Equation: C(x) = -0.16x + r where "x" is number of minutes of calls
29 = -0.16*25 + r
r = 29+4 dollars
r = 33 dollars
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So the Credit Remaining equation is:
C(x) = -0.16x + 33
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How much credit was there after 18 minutes of calls?
C(18) = -0.16*18+33
C(18) = $30.12
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Cheers,
Stan H.
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