Fill in the blank with the appropriate term.
A change in speed, direction, or both is called __________.
Acceleration is a(n) __________ because it includes both size and direction.
A decrease in speed is called __________.
To calculate acceleration without a change in direction, you divide the change in velocity by the change in __________.
Acceleration is represented by the __________ of a velocity-time graph.
If the line of a velocity-time graph is horizontal, acceleration is __________.
If a car is increasing in speed, its acceleration is __________.