The document discusses exponential functions and equations. It begins by explaining that exponential functions model real-life situations like population growth and decay. It then defines the exponential function f(x)=bx as having a variable exponent x and fixed base b. The graph of an exponential function either increases or decreases rapidly depending on if the exponent is positive or negative. It also shows that exponential equations set the exponents of both sides equal to solve for the variable exponent. Several examples are worked through step-by-step to demonstrate solving exponential equations algebraically by setting the exponents equal.