What are perpendicular lines

The video tutorial explains the differences between parallel and perpendicular lines. It begins with a review of parallel lines, highlighting their constant slopes and different Y intercepts. The focus then shifts to perpendicular lines, which intersect at 90 degrees and can have the same or different Y intercepts. The tutorial emphasizes that perpendicular lines have opposite reciprocal slopes, with one being positive and the other negative. The video concludes with a brief overview of how to find perpendicular lines given an equation and a point.

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