Question

which statement best describes how velocity and acceleration are related?
acceleration is the rate of change of velocity.
velocity is the rate of change in acceleration.
acceleration is another word for velocity.
acceleration is always negative, and velocity is always positive.

Explanation:

Acceleration is defined as the rate of change of velocity. Velocity is the rate of change of displacement. Acceleration and velocity are not the same (so acceleration is not another word for velocity). Velocity is not the rate of change of acceleration. Acceleration can be positive or negative (not always negative), and velocity can also be negative (when direction is opposite to the chosen positive direction).

Answer:

Acceleration is the rate of change of velocity.