SAT Desmos Reference Sheet

High-value Desmos moves

Use Desmos to verify algebra, find intersections, test answer choices, and model word problems.

• Graph both sides of an equation and find intersections.
• Use tables to test answer choices quickly.
• Use sliders for unknown constants.
• Use regression for data-model questions.
• Use restrictions to narrow domains.

When not to use Desmos

Do not open Desmos when mental math or one algebra step is faster. The calculator is a speed tool, not a replacement for fundamentals.

How to use this on real SAT questions

Treat this as a decision sheet, not a list to memorize. The SAT rewards knowing when Desmos is faster than paper algebra and when it is just extra clicking.

• Use graphing for intersections, roots, and systems.
• Use tables for function values and repeated substitutions.
• Use regression for data-model questions with enough points to justify a model.
• Stay with algebra for one-step equations, simple percentages, and mental-math checks.

How to turn this into SAT Math points

For Math resources, the useful question is always: which setup gets me to the answer fastest? Decide between mental math, paper algebra, Desmos, or answer-choice testing before you start calculating.

• Use Desmos for intersections, roots, vertices, tables, and regression.
• Use paper algebra when the equation is short or already factored.
• Use answer choices when they are ordered and easy to substitute.
• After every miss, label it as setup, algebra, calculator, or reading error.