Explore linear equations and graphs through interactive lessons, videos, and exercises on Khan Academy. Enhance your algebra skills for free.

In this video, we explore the idea of linear relationships using everyday examples. We start with students A and B to show how marks and effort can be compared.

Graphing proportional relationships Learn Rates & proportional relationships example

In this unit, we'll dive into the world of linear equations and graphs. We'll learn about slope, intercepts, and the secrets to drawing perfectly straight lines. As we progress, we'll develop …

How do I interpret a linear graph and create an equation (linear equation) from that graph? Please explain.

Learn how to create a graph of the linear equation y = 2x + 7. Created by Sal Khan and CK-12 Foundation.

Intro to graphing systems of inequalities Graphing systems of inequalities Graphs of linear systems and inequalities | Lesson Systems of inequalities graphs Inequalities (systems & …

Sal finds the y-intercept and the slope of a linear relationship representing someone accumulating cats! He then interprets what the y-intercept and the slope mean in that context.

If we performed an 3D linear equation on a graph with an x, y, and z axis, would there be such thing as a z-intercept?

There are three major forms of linear equations: point-slope form, standard form, and slope-intercept form. We review all three in this article.