Lesson: Domain and Range of a Rational Function Mathematics

In this lesson, we will learn how to find the domain and range of a rational function either from its graph or its defining rule.

Lesson Plan

Students will be able to

find the domain of a rational function by setting the denominator to zero and solving the resulting equation,
find the range of a rational function by sketching its graph, looking at its behavior near the points where the denominator is zero, and looking at its behavior as becomes very large and positive or negative.