Reading Motion Graphs

The vertical axis shows position. Is the position changing over time? No, the object is in the same position. If there is no change in position, the object is not moving.

The vertical axis shows position. Is the position changing over time? Yes, it is. So this shows a moving object. This line is straight so the rate of change is constant. Every second the object moves the same amount

No, this object is moving. If you look at the vertical axis it shows velocity, not position. The flat line here shows something is not changing, but it is the velocity that is not changing. The velocity is not zero so the object is moving.

The vertical axis shows position. Both lines show a change in position. The red line shows a larger change in position in a shorter period of time. The Green line takes more time to cover a shorter distance.

The red line shows a faster rate of motion than the green line.

The red line shows a constant velocity that is greater then the constant velocity of the green line. A flat line does not alway mean stopped, it means what ever is on the vertical axis is not changing.

Since the vertical axis shows position, these flat lines show the positions are not changing, they are both stopped. The red line shows an object stopped a greater distance from the reference point than the green line.