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
Question 403333: 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 -0.13. There is $22.60 in credit remaining on the card after 20 minutes of calls. How much credit was there after 8 minutes of calls? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = credit remaining on card
given:
the equation is
There was $24.16 worth of credit left
Here's a plot:
