ore in gradebook: 0.3 out of 1 1 car is driving away from a crosswalk. The formula d = + + 2t expresses the car's distance from the crosswalk in feet, d, in terms of the number of seconds, t, since the car started moving. 2. Suppose t varies from t = 1 tot = 5. i. Does the car travel at a constant speed over this interval of time? No i. What is the car's average speed over this interval of time? 1x feet per second Preview b. Suppose t varies from t = 1.4 tot = 2.2. i. Does the car travel at a constant speed over this interval of time? No ii. What is the car's average speed over this interval of time? feet per second Preview