SOLUTION: create a linear equation to represent the monthly bill. Plan A $39.99 for 200 min and $1.25 for each min after. Plan B $29.99 for 200 min and $1.50 for each min after.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: create a linear equation to represent the monthly bill. Plan A $39.99 for 200 min and $1.25 for each min after. Plan B $29.99 for 200 min and $1.50 for each min after.      Log On


   

Question 1070856: create a linear equation to represent the monthly bill.
Plan A $39.99 for 200 min and $1.25 for each min after. Plan B $29.99 for 200 min and $1.50 for each min after.
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
plan A.
39.99 for 200 minutes and 1.25 for each minute after.
c = cost.
c = 39.99 for x <= 200
c = 1.25 * x for x > 200

plan B.
29.99 for 200 minutes and 1.50 for each minute after.
c = cost.
c = 29.99 for x<= 200
c = 1.50 * x for x > 200.

these have to be step wise functions since there is a flat rate when x <= 200 and then an incremental rate after that.

in fact, in real life, there would be computer algorithms involved that would charge the flat rate if the number of minutes was 200 or less and then add an increment if the number of minutes exceeded 200.