# Ch 18: Rational Expressions and Function Graphs: Homework Help

### About This Chapter

## How it works:

- Identify which concepts are covered on your rational expressions and function graphs homework.
- Find videos on those topics within this chapter.
- Watch fun videos, pausing and reviewing as needed.
- Complete sample problems and get instant feedback.
- Finish your rational expressions and function graphs homework with ease!

## Topics from your homework you'll be able to complete:

- Multiplying and dividing rational expressions
- Adding and subtracting rational expressions
- Solving rational equations
- Graphing rational functions
- Analyzing the graph of a rational function

### 1. How to Multiply and Divide Rational Expressions

Multiplying and dividing rational polynomial expressions is exactly like multiplying and dividing fractions. Like fractions, we will reduce. With polynomial expressions we use factoring and canceling. I also give you a little mnemonic to help you remember when you need a common denominator and when you don't.

### 2. Multiplying and Dividing Rational Expressions: Practice Problems

Let's continue looking at multiplying and dividing rational polynomials. In this lesson, we will look at a couple longer problems, while giving you some practice multiplying and dividing.

### 3. How to Add and Subtract Rational Expressions

Adding and subtracting rational expressions brings everything you learned about fractions into the world of algebra. We will mix common denominators with factoring and FOILing.

### 4. Practice Adding and Subtracting Rational Expressions

Adding and subtracting rational expressions can feel daunting, especially when trying to find a common denominator. Let me show you the process I like to use. I think it will make adding and subtracting rational expressions more enjoyable!

### 5. How to Solve a Rational Equation

A rational equation is one that contains fractions. Yes, we will be finding a common denominator that has 'x's. But no worries! Together we will use a process that will help us solve rational equations every time!

### 6. Graphing Rational Functions That Have Linear Polynomials: Steps & Examples

Watch this video lesson to learn how you can graph rational functions with linear polynomials in just a few steps. Also learn what kinds of functions these are and what you need to look for to graph them.

### 7. Graphing Rational Functions That Have Polynomials of Various Degrees: Steps & Examples

Graphing rational functions is not as hard or as scary as it sounds. Sure, the functions may be big, but watch this video lesson and you will see that graphing these functions can actually be easy.

### 8. Analyzing the Graph of a Rational Function: Asymptotes, Domain, and Range

A rational function arises from the ratio of two polynomial expressions. The graphs of rational functions often have distinct characteristics. In this lesson, we look at how to analyze some of those characteristics.

### 9. Asymptote: Definition & Meaning

Sometimes, a graph of a curve will get closer and closer to a line without ever reaching it. This line is called an asymptote, and it can be horizontal, vertical, or slanted.

### 10. Asymptotic Discontinuity: Definition & Concept

Learn which type of functions are the most common for producing asymptotic discontinuities. Also in this lesson, see what such a discontinuity looks like when graphed and how you can easily check for their presence.

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### Other Chapters

Other chapters within the High School Precalculus: Homework Help Resource course

- Working with Linear Equations: Homework Help
- Working With Inequalities: Homework Help
- Absolute Value Equations: Homework Help
- Working with Complex Numbers: Homework Help
- Systems of Linear Equations: Homework Help
- Mathematical Modeling: Homework Help
- Introduction to Quadratics: Homework Help
- Working with Quadratic Functions: Homework Help
- Geometry Basics for Precalculus: Homework Help
- Functions - Basics for Precalculus: Homework Help
- Understanding Function Operations: Homework Help
- Graph Symmetry: Homework Help
- Graphing with Functions: Homework Help
- Rate of Change in Precalculus: Homework Help
- Polynomial Functions Basics: Homework Help
- Higher-Degree Polynomial Functions: Homework Help
- Rational Functions & Difference Quotients: Homework Help
- Exponential Functions & Logarithmic Functions: Homework Help
- Using Trigonometric Functions: Homework Help
- Trigonometric Graphs: Homework Help
- Solving Trigonometric Equations: Homework Help
- Trigonometric Identities: Homework Help
- Trigonometric Applications in Precalculus: Homework Help
- Graphing Piecewise Functions: Homework Help
- Vectors, Matrices and Determinants: Homework Help
- Mathematical Sequences and Series: Homework Help
- Sets in Algebra: Homework Help
- Analytic Geometry and Conic Sections: Homework Help
- Polar Coordinates and Parameterizations: Homework Help
- Continuity in Precalculus: Homework Help
- Limits in Precalculus: Homework Help