The Point-Slope Formula
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State
The point-slope formula turns one point and a slope into a line's equation: y − y₁ = m(x − x₁).
Show
Slope 2 through (1, 2): y − 2 = 2(x − 1), which unwraps to y = 2x, slope-intercept recovered.
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The subtracted coordinates belong to the known point.
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- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.