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 $ blank per hour. The electrician charges $ blank per hour.
The plumber charges $140 per hour The electrician charges $ 115 dollars per hour. Explanation; For the plumber, the amount charged when hours worked = 1 is given by; y=55(1)+85 =140 For the electrician, the amount charged is found the table when the hours worked is 1.