F-IF.3.8.b

Write a function defined by an expression in different but equivalent forms to reveal and explain different properties of the function.

b. Use the properties of exponents to interpret expressions for exponential functions. For example, identify percent rate of change in functions such as y = 1.02^t, y = 0.97^t, y = 1.01^12t, y = 1.2^(t/10), and classify them as representing exponential growth or decay.