At time $t = 0$, a body starts from rest and travels in a straight line with constant acceleration. When the time is $t$, the body is at a distance $s$ from its rest position. A graph of $s$ against $t^{2}$ is plotted, as shown. Which statement gives the acceleration of the body?
- AIt is equal to half the value of the gradient of the graph.
- BIt is equal to the value of the gradient of the graph.
- CIt is equal to twice the value of the gradient of the graph.
- DIt is equal to the reciprocal of the gradient of the graph.