Question 607367
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
 {{{y = (x+6)/(x+4) }}}
this alone tell us the x=intercept = -6 and x = -4 is an Asymptote

{{{drawing(300,300,   -10,10,-10,10,blue(line(-4,10,-4,-10))  ,   
 grid(1),
circle(-6, 0,0.4),

graph( 300, 300, -10,10,-10,10,0,(x+6)/(x+4)))}}}