A car dealership owner found the relationship between the number of days a car sits unsold on the lot and the amount of money it can be sold for can be modeled by the equation y = 22,000 - 50x where x is the number of days the car sits unsold on the lot and y is the sales price. According to the model, after how many days can a car sit unsold before the sales price is exactly $20,000? Responses 4 4 40 40 400 400 2,000