(khan academy)

cars lose value the farther they are driven. a random sample of 11 cars for sale was taken. all 11 cars were the same make and model. a line was fit to the data to model the relationship between how far each car had been driven and its selling price. which of these linear equations best describes the given model? choose one (option a) y=1/2x+40 (option b) y=-x+40 (option c) -1/4x+40. based on this equation, estimate the price of a car that had been driven 56 thousand kilometers.