Answer:
Parallel or perpendicular lines are usually written in the slope-intercept form, y = mx + b (where "m" represents the slope, and "b" represents the y-intercept). The only difference between the linear equations of parallel or perpendicular lines is the slope.
Parallel lines have the same slope.
Example: y = 2x + 4
y = 2x - 8
Perpendicular lines have negative reciprocal slopes (which means that the product of both slopes = -1).
Example: y = 2x + 4
y = -½x - 8
The negative reciprocal of 2 is -½. If you multiply these two slopes, it will result in -1: (2) (-½) = -1
Attached are the screenshots of the equations I used as examples.
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