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 316076: 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 -0.15 See the figure below.
There is 34.05 in credit remaining on the card after 27 minutes of calls. How much credit will there be after 34 minutes of calls? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website!
You are given the slope of a straight line and a point
on that line. Credit remaining is plotted on the y-axis
and total calling time is on the x-axis
(x,y) = (27,34.05)
the formula to use is:
Now solve for y, given the point (34,y)
There is $33 credit after 34 min of calls
