Find the vertical asymptote (s) of the graph given y=8/x

The vertical asymptotes are shown for an x-value where the y-value is undefined. Clearly, the value which makes the y-value not defined, is x = 0. So this is the only vertical asymptote for this function. You were maybe confused since there was a constant 8, but this hold for all functions y = C/x (where C is not 0).