This document discusses exponential functions and their graphs. It covers the basic exponential function f(x) = a^x where a is a positive number. Examples are given of evaluating basic exponential functions at different values of x. The one-to-one property of exponential functions is demonstrated. The graph of the basic exponential function f(x) = 2^x is shown and its asymptote is identified as the line y = 0. Shifting and reflecting the graph are discussed, and it is noted how the asymptote changes with shifting.