In an exponential function, the base (number under the exponent) determines whether the function is growing or decaying. When b > 1, it is growing. When b < 1, it is decaying. In this case, the base is 1.71, so this is a growth function. To find the rate of change of a growth function, subtract 1 from the base. The growth rate of increase is 0.71, or 71%.
