# How do you find vertical asymptote of exponential function?

The exponential function $y = {a}^{x}$ generally has no vertical asymptotes, only horizontal ones.
Generally, the exponential function $y = {a}^{x}$ has no vertical asymptote as its domain is all real numbers (meaning there are no $x$ for which it would not exist); rather, it has the horizontal asymptote $y = 0$ as ${\lim}_{x \to - \infty} {a}^{x} = 0$