Slope of a position-time graph determines

The slope of a position-time graph determines the velocity of an object. Here's how you can calculate it:

1. Identify two points on the graph. These points represent two different positions of the object at two different times.

2. Subtract the position value of the first point from the position value of the second point. This gives you the change in position, or displacement.

3. Subtract the time value of the first point from the time value of the second point. This gives you the change in time.

4. Divide the displacement by the change in time. This gives you the average velocity of the object between the two points.

Remember, if the slope is positive, the object is moving in a positive direction. If the slope is negative, the object is moving in a negative direction. If the slope is zero, the object is not moving.