Exponential growth is a process that increases quantity over time. Y t a e kt. Examples of exponential growth and decay include population growth radioactive decay continuously com-pounded interest and Newtonw Law of Cooling.
The exponent for exponential growth is always positive and greater than 1.
In general if r represents the growth or decay factor as a decimal then. It provides the formulas and equations funct. In such cases I find it best to start plotting the graphs on the graph paper one by one. Exponential growth and decay often involve very large or very small numbers.