[tex]g(x)\text{ = -12(x + 4)}[/tex]
Explanation:[tex]f(x)\text{ = -3x}[/tex][tex]\begin{gathered} \text{Translation to the right:} \\ \text{unit = 4} \\ f(x)\text{ = -3(x - 4)} \end{gathered}[/tex][tex]\begin{gathered} vertical\text{ stretch of 4 units: } \\ \text{Multiply f(x) by 4} \\ g(x)\text{ = 4(f(x)} \\ g(x)\text{ = 4(-3(x + 4))} \\ g(x)\text{ = -12(x + 4)} \end{gathered}[/tex]