Ben is starting a business to wash his neighbors cars. He will earn $9.50 per car he washes, plus an additional $50 his mom gave him as a bonus. If 'y' represents total profit, and 'x' represents the cars he washes, what equation can model Ben's profit per car he washes?
A. y = 50x + 9.50
B. y = 9.50x + 50
C. y = 59.50
D. y=9.50% - 50