The graph that could be the graph of a cubic function is graph C.
Which of the following graphs could represent a cubic function?
Remember that a cubic function can have 3 roots, or 1 root and a change of curvature.
First, none of the graphs has 3 roots, so we can discard that idea.
Now, if you look at the first and second graphs, these are parabolas (quadratic equations), and the fourth one is a linear equation.
With all that, we can conclude that the correct option is C.
If you want to learn more about cubic functions:
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