This document provides an overview of exponential functions. Exponential functions have the form f(x)=bx, where b is the base and x is the exponent. The exponent is the variable. Exponential functions are important for modeling real-life situations like population growth. They start off slowly but increase very rapidly. To solve exponential equations, express both sides with the same base and set the exponents equal. For example, to solve 54-t=25t-1, write the right side as (5)2t-1 and set the exponents equal: 4-t=2t-1.