Answer:
The parent function which is graphed is:
Cubic Function.
i.e.

Explanation:
Cubic function--
The parent cubic function is given by the equation:

The graph of a cubic function is such that both of it's end face is in the opposite direction.The graph of the function is symmetric about the origin and hence the cubic function is a odd function.
By looking at the graph we see that the function is: Cubic function.