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Linear functions are the most common SAT Math topic — 6–8 questions per test. Compute slope from two points, write equations in slope-intercept form, and use parallel/perpendicular relationships (m₂ = -1/m₁). Word problems test whether you can identify what a slope or y-intercept means in context. Practice sessions adapt to your accuracy — every question has a full solution, and if you miss one an AI tutor helps you spot the mistake through guiding questions.