Scoremojo editorial teamKey takeaways
- Graph both sides of an equation and read the intersection.
- Use Desmos to check, not to replace, simple algebra.
- Practise in the same calculator you'll use on test day.
Which Desmos moves save the most time?
- Solve by intersection: type each side of an equation as its own line and read where they cross.
- Find zeros: graph a quadratic and tap where it crosses the x-axis.
- Vertex in one tap: graph a parabola and tap the turning point for the maximum or minimum.
- Systems of equations: type both equations; the crossing point is the solution.
- Check an answer choice: substitute a choice and see whether both sides match.
- Tables: type points into a table to check a line or fit through data.
When is solving by hand faster?
For one-step equations, simple percentages and most geometry, typing takes longer than thinking. Use Desmos when an equation is messy or when you need to see a graph.
Common mistakeReaching for Desmos on every question. It costs seconds each time, and those seconds add up across 44 questions.
How should you practise with Desmos?
Do a few topic sets using only Desmos for the moves above, then a timed module where you decide for each question. That decision is the real skill.
Put this into practice today, free.Two full-length tests per exam are free on Scoremojo, timed and scored when you submit. No card.Start free
Questions students ask
Is Desmos available for every Math question?
Yes. The Desmos graphing calculator is built into the Bluebook app for the whole Math section.
Sources
- College Board — How the SAT Is Structured (read 30 Oct 2026)
Scoremojo is not affiliated with or endorsed by the College Board, ACT or the EST organisers.