Question

Question #b7c26

Answer 1

I would say: `y=0.3x+75`

Explanation:

Tou can write it as:
`y=0.3x+75`
where `y` represents the monthly cost considering the `x` minutes.

Answer 2

`y = 0.3x -225`

Explanation:

The first thing is to find out how many minutes there are more than the first 1000 minutes. Find the difference:

Number of minutes in excess of 1000 = `x -1000`

For each of those minutes he will pay $0.30.

He also pays the monthly fee of $75.

The total cost `y` is:

`y = 75 + 0.3(x-1000)`

This simplifies to `y = 75+ 0.3x - 300`

`y = 0.3x -225`

Check: Assume he uses 1200 minutes
Cost = `75+ 0.3 xx 200 = 135`
or: `y= 0.3 xx 1200 - 225 = 135`