In the theory of relativity, the mass of a particle is
$m=\frac{m_{0}}{\sqrt{1-v^{2} / c^{2}}}$
where $m_{0}$ is the rest mass of the particle, $m$ is the mass when the particle moves with speed $v$ relative to the observer, and $c$ is the speed of light. Sketch the graph of $m$ as a function of $v .$