Share
Explore BrainMass

linear function between credit remaining and calling time

There is credit remaining on a phone card in dollars that is a linear function of the total calling time in minutes. The funtion gives a line with a slope of -0.14.

There is a $23.78 credit on the card after 27 minutes of calls. How much credit is there after only 20 minutes in dollars.

Solution Preview

Please see the attached file for detailed solution.

let D be the money (in dollars) remaining on the phone card. And t is the total calling time ...

Solution Summary

The solution is comprised of step-by-step explanation of finding the linear function between the calling time and the credit remaining on a phone card. In turn, the credit remaining is calculated for a given calling time.

$2.19