In a displacement-time graph, the slope or gradient of the line, is equal to the velocity ... of the object. The steeper the line (and the greater the gradient) the faster the object is moving.

Carol is jogging at constant velocity. Below is the displacement-time graph for the first 10 s of her jog.

Kinematical Graphs The ‘displacement-time’ and the ‘velocity-time’ graphs of a particle are often used to provide us with avisual representation of the motion of a particle.