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$f\left(x\right)\rightarrow -pf\left(x\right)$

Move the slider to $p=-1$. This is the graph of $-f\left(x\right)$ where $f\left(x\right)$ is the original function.
Write down the new coordinates of the following points. For example $\left(-4,12\right)\rightarrow$$\left(-4,-12\right)$

$\left(-3,5\right)\rightarrow$

$\left(-2,0\right)\rightarrow$

$\left(0,-4\right)\rightarrow$

$\left(5,21\right)\rightarrow$
Move the slider to $p=-1$. This is the graph of $-f\left(x\right)$ where $f\left(x\right)$ is the original function.
For the tranformation $f\left(x\right)\rightarrow -f\left(x\right)$, the graph of $f\left(x\right)$ is in the -axis.