Given the functions f(x) and g(x) defined as:
[tex]\begin{gathered} f(x)=-8x+8 \\ g(x)=-4x+4 \end{gathered}[/tex]We see that the relation between them is:
[tex]\begin{gathered} f(x)=2g(x) \\ \Rightarrow g(x)=\frac{f(x)}{2} \end{gathered}[/tex]So, the transformation we need to perform is expressed as:
[tex]f(x)\rightarrow\frac{f(x)}{2}[/tex]And this corresponds to a vertical shrink