Question

A cell phone company chargers $60.00 a month for up to 1 gigabyte of data. The cost of additional data is $0.05 per megabyte. If d represents the number o additional megabytes used and c represents the total chargers at the end of the month, which linear equation can be used to determine a user's month bill?

Answer 1

The monthly bill mainly consists of two parts: the standard charge of $60 per month, and the cost of additional data consumed by the user after the first 1000 megabytes at $0.05 per megabyte. Translating this into an equation:

Monthly bill = standard charge + additional charge
where: standard charge = $60.00
m = megabytes
additional charge = $0.05(m - 1000)

monthly bill = $60.00 + $0.05(m - 1000)