Acceleration is equal to the rate of change of _____.

The correct answer is option 4. velocity.

Acceleration is equal to the rate of change of Velocity.

Acceleration, denoted by \( \text{a} \), is defined as the rate of change of velocity with respect to time. In mathematical terms, acceleration (\( \text{a} \)) is the derivative of velocity (\( \text{v} \)) with respect to time (\( \text{t} \)). So, acceleration represents how quickly the velocity of an object changes over time.