draw displacement graph for a freely falling body

Dear student,
considering your question to be about the displacement- time graph for free falling body; here is the answer;

we know,
$s = ut + ½at²$

freely falling body, initial velocity =u = 0, accleration=a= gravitational accleration= 9.8m/s²

So 
$$\begin{gathered} \Rightarrow s = 0 + ½ 9.8 t² \\ \Rightarrow s = 4.9 t² \end{gathered}$$

We know the graph will be similar to 

y = ax² , which is a parabola.

You can draw it by substituting the value of t at different times (t=1,2,3,4 etc)and finding the displacement at the time.

Regards,