Step-by-step explanation:
a vertical asymptote goes up and down.
the horizontal ones (like the horizon) go left and right.
A
1 vertical asymptote at x = 0
B
2 vertical asymptotes at x = -1 and x = +1
C
no vertical asymptote (whatever vertical line you can think of, it will always really cross the graph in finite space)
D
1 vertical asymptote at x = 3
E
like A
F
2 vertical asymptotes at x = -1 and x = +4
