Question

A repair service charges by the hour. The amount of money they charge is below. What equation does the repair service use to charge customers?

Answer 1

step 1

Find the slope

take the points (1,70) and (2,100)

so

m=(100-70)/(2-1)

m=30

step 2

Find the equation in slope intercept form

c=mh+b

we have

m=30

point (1,70)

substitute

70=30(1)+b

solve for b

70=30+b

b=40

therefore

c=30h+40