Question

Which of these functions below could be defined by a cubic equation?

Answer 1

Hello,

Answer B

y=x(x-3)(x+3) we know 3 points of the graph

A: we need a third point

Answer 2

Graph 2 is the cubic equation.

Explanation:

We have been given the two graphs

So, we will conclude the function by end behavior

The cubic function enters from the left downwards and exists the graph from the right.

Cubic function will have 3 zeroes being of 3rd degree

And since the second function cuts the graph at three points

Hence, second graph is the cubic equation.

Zeroes are: -3 ,0 and 3.