01Solve a system of two equations from one Desmos graphType each equation in its own input box in Desmos and click the point where the graphs cross to get the x- and y-values that solve both.
02Find the value of x + y or x − y for a system’s solutionClick the point where the lines cross and put its x-value and y-value into the expression the question asks for.
03Count the solutions of a system of two linear equationsFor nonvertical lines, compare slopes and y-intercepts. Different slopes give one crossing; equal slopes give parallel or identical lines. A vertical line crosses every nonvertical line once. Two vertical lines are either distinct or identical.
04Find every point where a line crosses a parabolaClick every point where the line crosses the parabola, then match the x-value of one of those points to the answer choices.
This lesson is part of the full library
207 lessons that teach every skill the SAT tests
71Math
40Reading
24Grammar
10 full-length practice tests to build test-day stamina and confidence
A Desmos simulator to solve math questions faster
A step-by-step guide to every practice test question
The Bluebook Simulator, so test day feels familiar
A drawing for every key term, so new ideas make sense at a glance
