Question

A cell phone company charges $60.00 a month for up to one gigabyte of data. The cost of additional data is $0.05 per megabyte. If d represents the number of additional gigabytes used and c represents the total charges at the end of the month, which liner equation can be used to determine a users monthly bill

Answer 1

c = 60 + 0.05d

Explanation:

The amount charged per gigabyte for a month = m$60.00

The cost of additional data per megabyte = $0.05

Total cost = amount charged per month + additional data * 0.05

Since c represents total cost and

d represents additional cost

thee equation in terms of c and d will be:

c = 60 + d(0.05)

Rearrange

c = 60 + 0.05d

Hence the linear equation that can be used to determine a users monthly bill is c = 60 + 0.05d