I have a question, which was not stated in my worksheet now that I'm reading it.

When we have an exponential function, we can express it as the following

$\displaystyle f(x) = ab^x$

a cannot = 0, b cannot = 1 b > 0

According to Sparknotes if I comprehended the concept, "The graph has a horizontal asymptote aty = 0, because 2^{x}> 0 for allx", does this mean the asymptote is always 0 ?

By the way my worksheet does not say vertical or horizontal asymptote, it simply says find the asymptote.