What is the shape of the graph between the speed and kinetic energy of a body

Kinetic energy of a body (KE) =

What is the shape of the graph between the pressure and speed of sound in a gaseous medium ?

The kinetic energy of rolling body is

Rotational Kinetic energy of a body is

The shape of the curve representing the relation between the speed and kinetic energy of a moving object is :

What is the difference between potential energy and kinetic energy ?