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Perpendicular and Parallel Lines
Perpendicular and Parallel Lines
Parallel lines are lines that never intersect, and they form the same angle when they cross another line. Perpendicular lines intersect at a 90-degree angle, forming a square corner.
Perpendicular Line
Perpendicular Line
Calculate the negative reciprocal of that slope. This is the slope of any line perpendicular to this one. Plug the slope of the line that is perpendicular into the slope-intercept form of a line, y = mx + b, to find m.
Parallel Line
Parallel Line
Lines are parallel if they have the same slope. The given line is in the form y=mx+b, where m is the slope and b is the y-intercept. For the given line, the slope is m=2, so the slope of the parallel line is also m=2.
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