Slope & Linear EquationsATI TEAS 7 cheat sheet

Rise over run

9 key facts Reviewed Oct 2026

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Slope

m = (y₂ − y₁) / (x₂ − x₁) — rise over run
Positive slope rises left to right; negative falls
Horizontal line = 0; vertical line is undefined

Slope-Intercept

y = mx + b — m is slope, b is the y-intercept
y = 2x + 3 crosses the y-axis at 3

Finding Intercepts

x-intercept: set y = 0
y-intercept: set x = 0

Parallel & Perpendicular

Parallel lines have equal slopes
Perpendicular slopes are negative reciprocals (2 and −1/2)

Key takeaway

Rise over run

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