Distance - Time Graph

The slope of distance time graph is said to be speed.

The distance - time graph is a straight line for such body whose motion is uniform.

The distance - time graph is not a straight line for such body whose motion is non - uniform.

The slope of displacement - time graph is said to be velocity.

The slope of displacement - time graph is said to be velocity.

The velocity time graph is said to be Acceleration.

The area described by velocity - time graph is said to be distance.

The rate of change of velocity per unit time of a moving body is said to be acceleration.It is generally denoted by "a".
Therefore,
a = (v - u)/t