Acceleration is the rate of change of speed.
Why some people say it's true: Think of accelerating in a car: when you hit the gas, you speed up, and when you hit the brake, you slow down. Acceleration is generally associated with a change in speed.
Why some people say it's false: In physics, direction matters. If the direction of motion changes, this could be considered acceleration too, even if the speed stays constant
Hope this help have a good day.
