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Equations of a Line
Beginning Algebra SI Video
Equations in slope-intercept form.
Aligned to Common Core State Standard: 8.EE.6
Use similar triangles to explain why the slope ? is the same between any two distinct points on a non-vertical line in the coordinate plane; derive the equation ? = ?? for a line through the origin and the equation ? = ?? + ? for a line intercepting the vertical axis at ?.