The equation y = 35.25x + 40 gives the labor cost y of repairing a car if it takes x hours to repair the car. which statement is true?

for every hour of labor, the cost decreases by $40.

for every hour of labor, the cost decreases by $35.25.

for every hour of labor, the cost increases by $40.

for every hour of labor, the cost increases by $35.25.