Stretch or Compress Function Vertically: cf(x)

$f(x)=x^2+2,\quad g(x)=-\frac{1}{6}x^2+6$

$f(x)=-\frac{1}{2}x+7,\quad g(x)=\frac{1}{12}x$

$f(x)=-3x^5+2,\quad g(x)=-\frac{1}{2}x^5+2$

$f(x)=-\frac{1}{3}x-7,\quad g(x)=\frac{1}{18}x+\frac{49}{6}$