- Position is the specific location of an object in space relative to a reference point or a starting point, such as a piece of tape with a zero marked on it.
- Distance is how far apart two points are with no regard to direction.
- Displacement is the change in position from the starting point to the ending point, including direction.
- Speed is how fast an object is moving, without considering direction.
- Velocity is the speed of an object in a specific direction, such as toward or away. It tells you how fast and in which direction.
- A coordinate point is an ordered pair of numbers, usually written in parentheses as (x, y), that shows a specific location on a graph. On a position–time graph, the first number (x) represents time, and the second number (y) represents position. Each point tells you exactly where the object was at a given time.
- Slope on a position–time graph shows the object's velocity. A steeper slope means a higher speed, and the sign (positive or negative) indicates direction.
- Y-intercept is the position value where the graph crosses the vertical axis. It represents the object's starting position at time zero.