What would the equation of the line be for this: Cell Phone Plan charges $40 a month and $.06 for each?

Question

minute after 900 minutes.

Answer 1

x = $40 + ((# minutes - 900)*$0.06)

plug in the # of minutes used to find the total cost

of course you will have miscellaneous taxes and fees added to your total :-(

Answer 2

This wouldn't really be a line. It would be 2 lines that intersect at 900,40.

Assume the x-axis is minutes and the y-axis is dollars.

for 0 ≤ x ≤ 900

y = 40

for 900 ≤ x ≤ total minutes for that month

y = 0.06x - 14

Answer 3

Hi,
Problems of this type are of the form:
Total Cost = Variable cost + Fixed Cost
For your problem:
C = .06X + 40

FE