just need some help.

(1 point) The stopping distance d of an automobile is directly proportional to the square of its speed U. A car required 75 feet to stop when its speed was 40 miles per hour. Find a mathematical model that gives the stopping distance d in terms of its speed U. Round the k value to 5 decimal places. Your answer is d = 2 Estimate the stopping distance to the nearest tenth of a foot if the brakes are applied when the car is traveling at 62 miles per hour. Your answer is: 2 feet