Linear Equations in 2 Variables

Every time you see a straight line on a graph, you're looking at a linear equation in two variables. This topic is one of the most heavily tested on the SAT Math section, and for good reason. It connects algebra to geometry in a way that keeps showing up: slope, y-intercept, parallel and perpendicular lines, systems with one solution or none.

Our quizzes and drills will help you build fluency in all of it. You'll practice solving for intercepts, interpreting slopes, and working with word problems that translate real situations into y = mx + b form. Get comfortable here, and you'll have a foundation that supports a huge portion of the test.