Before leaving this Module, let's review what we have learned. Linear functions are a basic family of functions easily represented by a table of values, a graph, or an equation. The essential property of such functions is a constant rate of change, represented by the slope, which makes them useful in representing many real-world activities and events.

Yet, there are many other phenomena that do not change at a constant rate and, therefore, do not behave in a "straight-line" fashion. These events or activities are better represented by other types of algebraic functions. In the succeeding modules of this course, you learn about the properties and behavior of these other function families, including quadratic, polynomial, square root, and exponential functions. In the process, you will learn which type of function is the most appropriate to analyze and determine specific types of real-life behavior.

In the meantime, you are now ready to review linear functions and some of their applications, and prepare for a module test.