# Ch 1: Foundations of Linear Equations

Check out these video lessons on the foundations of algebra and learn about linear equations, systems of equations, graphs and more. These lessons use engaging and fun graphics and animations to teach you essential algebra concepts.

When learning algebra, it's important to develop a solid understanding of its foundations. In these videos, you'll learn basic algebra concepts, such as the different types of numbers (natural, whole, integers, rational, irrational and real), as well as the fundamentals of graphing. You'll learn the different parts of the graph, which is also known as the Cartesian plane. These basic parts include the x and y-axes, four quadrants, the x and y-intercepts and ordered pairs.

Next, you'll focus on an important and common aspect of algebra known as linear equations. Linear equations are patterns of numbers that either increase or decrease by the same amount, and when graphed, they form (you guessed it) straight lines. You'll also find out some of the practical uses of linear equations. These include understanding and predicting patterns in real life, such as how many years you can expect your car to travel before it dies. Slope-intercept form and standard form help you graph and solve linear equations.

Later, you'll build on your graphing and linear equation skills by learning how to graph undefined slopes and zero slopes, go from a graph to a rule and solve more abstract algebra problems.

Building on linear equations, you'll become familiar with systems of equations and learn how to graph and apply them to real life. These videos can help you understand the practical uses of systems of equations, how to identify variables from word problems and how to perform substitution and elimination methods.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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### Other Chapters

Other chapters within the Math 101: College Algebra course

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