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

The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

Kinetic energy, $K.E=\frac{1}{2}m{v}^2\propto v^2$