Question

The equation y = 55x + 85 describes the amount of money a plumber charges, where y is the total amount he charges and x is the number of hours he works. The table shows the total amount of money an electrician charges.

How much does each charge per hour?

Number of hours worked 1 2 4 7
Total amount charged 115 180 310 505

The plumber charges $ ? per hour.
The electrician charges $ ? per hour.

Answer 1

in y=mx+b what is the slope?

Answer 2

@Lolafire

Answer 3

180