What does speed tell us?
How fast or slow an object is moving
The direction an object is moving in
How an object's velocity change
The rate at which velocity changes overtime
Only one option is correct, no answer choice is "All the above".
The correct answer is: "The rate at which velocity changes over time."
Speed is a scalar quantity that measures how fast or slow an object is moving. It does not provide information about the direction an object is moving in or how an object's velocity changes.