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How do you algebraically prove that two lines are parallel, and that two lines are perpendicular? Explain, and give a pair of equations for an example of each.
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How do you algebraically prove that two lines are parallel, and that two lines are perpendicular? Explain, and give a pair of equations for an example of each.

User Jan Pisl
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1 Answer

7 votes
Parallel lines have the same slope (the number before x).
Y=5+2x
Y=8+2x

Perpendicular lines have same slope but opposite signs

Y=5+2x
Y=7-2x
User Dredozubov
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