SOLUTION: The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The monthly cost for 39 minutes of calls is $12.33

Algebra ->  Linear-equations -> SOLUTION: The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The monthly cost for 39 minutes of calls is $12.33       Log On


   

Question 1144183: The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The monthly cost for 39
minutes of calls is $12.33
and the monthly cost for 66
minutes is $15.57
. What is the monthly cost for 65
minutes of calls?


Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
(x,y):
(39,12.33) & (66,15.57)

y-12.33=%28%2815.57-12.33%29%2F%2866-39%29%29%28x-39%29
.
.
!