a change in the direction of the car a change in the distance the car travels the change in velocity divided by the time for that change the change in the time for the car to travel a distance
I gave my students this multiple choice question: The motion of a car accelerating in a straight line differs from the motion of a car moving in a straight line at a constant speed. Which change best describes acceleration of a car?

Only one answer is correct among these 4 choices:
- a change in the direction of the car
- a change in the distance the car travels
- the change in velocity divided by the time for that change
- the change in the time for the car to travel a distance

Could you tell me which one is correct?

the change in velocity divided by the time for that change