Interpret graphs in kinematics for motion in a straight line (#125)

Interpret graphs in kinematics for motion in a straight line (#125)

bDisplacement-time graphs/b

(x)-axis: Time
(y)-axis: Displacement
Gradient represents velocity

bVelocity-time graphs/b

(x)-axis: Time
(y)-axis: Velocity
Gradient represents acceleration
Area under graph represents total distance travelled