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Desmos techniques

The handful of Desmos moves that solve most SAT math questions. Learn them in order: each one has a live example, then practice problems that use it.

1. 1Free with an accountGraph both sides and intersectTurn any equation or system into two graphs and let Desmos find where they meet.109 practice problems
2. 2Click the gray points: zeros and verticesDesmos marks a graph's x-intercepts, maximums, and minimums automatically. Click them instead of factoring.33 practice problems
3. 3Use a slider for an unknown constantWhen a question has a constant like $k$, $a$, or $c$, let Desmos make it a slider and drag until the graph does what the question asks.42 practice problems
4. 4Fit data with a regressionEnter data and use the ~ symbol to find the best-fit line or curve, with its exact coefficients.16 practice problems
5. 5Define functions and evaluate themType the function once, then let Desmos plug in values, including functions inside other functions.44 practice problems
6. 6Lists and statistics functionsStore a data set as a list, then get the mean, median, and more without adding anything by hand.12 practice problems
7. 7Plot the answer choicesWhen the choices are points or equations, graph them all and see which one fits.39 practice problems
8. 8Graph equations exactly as writtenDesmos graphs equations in any form. Skip rearranging into $y = mx + b$ or completing the square.59 practice problems
9. 9Quick calculations and built-in functionsDesmos is also a full scientific calculator, with fractions, square roots, trig, and a distance function.84 practice problems