Form the equation will be in: y = mx + b
Equation: y = 25x + 504
3.
m = the cost per hour for labor
x = the number of hours of labor
b = the cost of parts
y = the total cost of parts and labor, or the total cost of the repair (both are the same)
4.
y = 25(5) + 504
y = 125 + 504
y = $629
Mr. Conner had to pay $629 if it took them 5 hours to repair his car
Hope this helps!! :)