# Ch 4: Foundations and Linear Equations: Homework Help

### About This Chapter

## How it works:

- Identify which concepts are covered on your foundations and linear equations 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 foundations and linear equations homework with ease!

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

- Understanding various types of numbers and parts of graphs
- Graphing linear equations in standard form
- Graphing zero slope and undefined slope
- Writing a linear equation and using a system of equations

### 1. What are the Different Types of Numbers?

Learn all of the different types of numbers: natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers. This video lesson teaches you how to classify any numbers you come across.

### 2. What Are the Different Parts of a Graph?

Being able to read a graph isn't just vital for an algebra class. Graphs and charts are used everywhere! We'll take a crash course on the basic x/y plane used in algebra and the fundamental vocab you need.

### 3. What is a Linear Equation?

Most cars won't be able to run for more than 250,000 miles, so how much longer will your car live? Linear Equations are the most basic kind of algebraic function and can help you answer questions exactly like this. Learn about what they look like, how they come up in your life and why they are powerful tools.

### 4. Linear Equations: Intercepts, Standard Form and Graphing

Do you know what to do if an equation doesn't look like y=mx+b?! If not, then this video is for you. Chances are the equation is in standard form, so we'll learn how to use standard form equations, how to graph them and why they can be helpful.

### 5. Abstract Algebraic Examples and Going from a Graph to a Rule

Just because you now know what a linear equation is doesn't mean that you are a master! This video will help you learn how to apply your knowledge of linear equations in more abstract algebraic ways.

### 6. Graphing Undefined Slope, Zero Slope and More

There are two special cases when it comes to slopes on the xy plane: horizontal and vertical lines. Without any more information, these examples can be pretty confusing. But with a little instruction, they end up being some of the easiest lines to graph!

### 7. How to Write a Linear Equation

Simply knowing how to take a linear equation and graph it is only half of the battle. You should also be able to come up with the equation if you're given the right information.

### 8. What is a System of Equations?

So what happens if we want to compare more than one equation? Welcome to a 'system' of equations! Learn what one is, how to solve them and when they come up in real life.

### 9. How Do I Use a System of Equations?

There are a few classic algebra word problems, such as the one about two trains traveling at different speeds. In this lesson, you'll learn how to take a word problem and convert it into the system of equations that will allow you to find the answer using either substitution or elimination.

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### Other Chapters

Other chapters within the Precalculus: Homework Help Resource course

- Functions: Homework Help
- Evaluating Exponential and Logarithmic Functions: Homework Help
- Inequalities: Homework Help
- Graphing and Rational Equations: Homework Help
- Factoring and Graphing Quadratic Equations: Homework Help
- Exponents and Polynomials: Homework Help
- Piecewise and Composite Functions: Homework Help
- Geometry and Trigonometry: Homework Help
- Using Scientific Calculators: Homework Help
- Trigonometry: Homework Help