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

If the velocity of an object of mass $300 \ g$ is $(3\hat{i} + 4\hat{j}) \ m/s$,then its kinetic energy is . . . . . . $J$.

$A$ light body of momentum $P_L$ and a heavy body of momentum $P_H$,both have the same kinetic energy,then:

Two masses of $1\,kg$ and $16\,kg$ are moving with equal kinetic energy. The ratio of the magnitude of their linear momentum is:

Three bodies $P$,$Q$ and $R$ have masses $m \ kg$,$2m \ kg$ and $3m \ kg$ respectively. If all the bodies have equal kinetic energy,then which body/bodies will have the greater momentum?

Which of the following graphs represents the graphical relation between momentum $(p)$ and kinetic energy $(K)$ for a body in motion?