The position (in thousands of feet) of a car driving along a straight road at time $t$ in minutes is given by the function $y = s(t)$ that is pictured below.

Let $v(t)$ denote the velocity of the car (in thousands of feet per minute) at time $t$ (in minutes). Which graph A-F is the best representative of the derivative function $v'(t)$? ? A B C D E F

A		B		C
D		E		F

(Note: the vertical axes of these graphs may have been scaled to to fit these functions. Click on a graph to enlarge it.)

Which of the following statements are true? Select all that apply.

A. The function $v'$ represents the position of the car.

B. If $v'(t)$ is zero, then $v(t)$ must be zero.

C. When $v(t)$ is positive, $v'(t)$ must also be positive.

D. There are times when $v'(t)$ is zero and $v(t)$ is not zero.

E. When $v'(t)$ is negative, the car is slowing down.

F. The function $v'$ represents the acceleration of the car.

G. When $v'(t)$ is negative, the car is moving backwards.

H. None of the above statements are true.