Answer
$$
y=x^{4}+4x^{3}-20
$$
The graph of $y=x^{4}+4x^{3}-20 $ has both ends up, at most three turning points, and a $y$-intercept
of $-20$.
This is graph $F$.
Work Step by Step
$$
y=x^{4}+4x^{3}-20
$$
The graph of $y=x^{4}+4x^{3}-20 $ has both ends up, at most three turning points, and a $y$-intercept
of $-20$.
This is graph $F$.