Question

An electrician charges $20 for a service call plus $40 per hour of service. Write an equation in slope-intercept form for the cost, C, after h hours of service. What will be the total cost for 8 hours of work? 10 hours of work?

Answer 1

Explanation:

Regular charge- $20

Every hour of service cost- $40

Equation or slope intercept form-

C= 40h+20

Part 1- 20+40(8)=

40 multiplied by 8 320+20 = $340

Part 2- 20+40(10)=

40 multiplied by 10 400+20 = $420