# Parallel and Perpendicular Lines

Learn about the relationship between parallel and perpendicular lines.

Parallel lines have the same slope but different y-intercepts. Ex: $y= 2x+7$ and $y=2x-3$ are parallel.

Perpendicular lines have slopes that are the negative reciprocals of each other and may or may not have the same y-intercept. Ex: $y= 4x+3$ and $y=-\frac{1}{4}x+4$ are perpendicular

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Used by students across the country. Pre-Algebra, Algebra I, Geometry, & Algebra II