Question 813586
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
f(x) = (x-4)/(x(x-4)) = 1/x  | x &#8800; 0 , vertical asymptote is x = 0  (or the y-axis)
{{{drawing(300,300,   -6, 6, -6, 6,  grid(1),

graph( 300, 300, -6, 6, -6, 6,0,1/x))}}}