We will have the following:
1.
[tex]y=-(x+1)^3[/tex]
Thus:
[tex]x=-(y+1)^3\Rightarrow y=-\sqrt[3]{x}-1[/tex]
So, g(n) is not the inverse function.
2.
[tex]y=\frac{-16+x}{4}[/tex]
Thus:
[tex]x=\frac{-16+y}{4}\Rightarrow y=4x+16[/tex]
So, g(n) is the inverse function.
