What does the gradient represent on a velocity vs time graph

Please include some examples also.

gradient or tangent on a point in the velocity time graph tells about instanteneous acceleration for eg
at a point (3,4) on the velocity time graph says that at that instant its acceleration is given by
tan(theta) = 4/3
if the ballsd does so it is moving with 6.5 meter per second so velocity is 6.5m/s and time is 1 sec so gradient is v/t = 6.5