What is the equation for the asymptote of the function

f (x) = 2^x?

The function 2^x is exponential.

It keeps growing as x goes to + infinity so it does not have horizontal asymptote to the right.

The limit of 2^x when x goes to - inifinity is 0, so y = 0 is a horizontal asymptote.

It does not have vertical asymptotes because the function is defined for all the real x values.

Answer: y = 0