Graphing Rational Functions and Domain and Range: Introduction

If you have ever taken a chemistry class and had to represent solutions through equations, then you have worked with rational functions. An example of a rational solution in chemistry might look like this:

Suppose you start with 50 milliliters of a 20% saline solution and you add x milliliters of water. If you write a function to represent the salt concentration of this solution it would look like

Chemistry is just one example of a real-world application of rational functions. In this section you will learn to graph these types of functions and find their domain and range.