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SAT Math / Algebra

SAT topic

Linear equations

Slope-intercept form and what m and b mean.

Learning goals

  • Rewrite a linear equation to identify slope and intercept.
  • Use two points to find the slope of a line.

Explanation

A linear equation can often be rearranged into a form such as y = mx + b, where m is the slope and b is the y-intercept.

Common mistakes

  • Subtracting the coordinates in different orders in the numerator and denominator.
  • Calling b the slope because it is the first number you see in a word problem.

Practice

1 of 1Linear equations · easy · multiple choice

If 2x + 7 = 19, what is the value of x?

Original Marlow Works item — not a College Board question.

Take your time—this is practice, not a test.

Quick review

  1. 01Isolate y if you need slope or intercept.
  2. 02Write rise over run with consistent point order.
  3. 03Check the intercept by plugging in x = 0.
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Related resources

External links with reuse status. Marlow Works is independent and does not copy restricted exam or textbook material.

  • Official / link only

    Official SAT practice hub

    College Board SAT practice landing page, including links to tests and tools.

    College Board · All rights reserved · accessed 2026-10-01

    Open source

  • Official / link only

    Bluebook full-length practice

    Official digital SAT practice tests in the Bluebook app.

    College Board · All rights reserved · accessed 2026-10-01

    Open source

  • Official / link only

    Student Question Bank

    Official SAT practice questions hosted by College Board.

    College Board · All rights reserved · accessed 2026-10-01

    Use as an external link. Do not republish question stems.

    Open source

  • Official / link only

    Official SAT Prep on Khan Academy

    College Board describes this as free Official SAT Prep with lessons, hints, and walkthroughs.

    Khan Academy / College Board · All rights reserved · accessed 2026-10-01

    Open source

  • Reference only — do not copy

    OpenStax College Algebra 2e

    Algebra reference; current terms include noncommercial and AI-ingestion limits.

    OpenStax · Restricted — see publisher page · accessed 2026-10-01

    Open source