At time , a body moves from rest with constant acceleration in a straight line. At time , the body is distance from its rest position. A graph is drawn of against , as shown
Which statement describes the acceleration of the body?
It is equal to half the value of the gradient of the graph.
It is equal to the value of the gradient of the graph.
It is equal to twice the value of the gradient of the graph.
It is equal to the reciprocal of the gradient of the graph.