Draw the graph of $y$ versus $t$ for an object falling freely,where $y$ is the vertical displacement and $t$ is time.

(N/A) For an object falling freely under gravity starting from rest,the equation of motion is given by $y = \frac{1}{2}gt^2$,where $g$ is the acceleration due to gravity.
Since $y$ is proportional to the square of time $(y \propto t^2)$,the graph of $y$ versus $t$ is a parabola opening upwards.
Starting from the origin $(0,0)$,the curve increases as $t$ increases,representing the increasing displacement of the object as it accelerates downwards.