16.What is the equation of the vertical asymptote for the function f(x) = x-1,x+4(A) x=1(B) x=-1(C) x=4(D) x=-417.

The vertical asymptotes is when the denominator is 0
Hence we have
[tex]\begin{gathered} x+4=0 \\ x=-4 \end{gathered}[/tex]X=-4 is the vertical asymptote
The right option is D