Math strategy

Using Desmos on Digital SAT Math

The built-in graphing calculator can check algebra quickly, but it works best when you know what the question is asking. Use it to test an answer, find an intersection, inspect a table, or estimate a graph—not as a substitute for reading the model carefully.

Four useful Desmos moves

  1. Check an equation: Enter both sides as separate expressions. Their intersection shows where they are equal.
  2. Find a root: Graph the expression and inspect where it crosses the x-axis. Confirm the result in the original equation.
  3. Use a table: Turn on a table to compare input and output values or look for a pattern in a function.
  4. Test choices: Substitute each answer into the equation or scenario. Stop when one choice satisfies every stated condition.

Protect your time

Translate the words into an equation first, then decide whether graphing is faster than solving by hand. Practice the workflow in official Bluebook tests, and use the Math strategies in the deck to review the underlying concept after each miss.

The calculator and test interface can change. Check College Board’s current Math overview before test day.