Answer
See the explanation
Work Step by Step
$y=-4x^3-5x^2$
Because the highest exponent is $3$, which is odd, and the leading coefficient is $-4$, negative, the end behavior of the graph is up, and down.
When you graph this equation, the graph is a backward S shape.
The turning points of the graph are $(0,0)$ and $(-1,-1)$, the intervals are: negative infinity to $0$, $0$ to $-1$, $-1$ to positive infinity.
