Question

What are the 3 types of relationships between lines?

Accepted Answer

*Parallel lines have the same slope and do not intersect:    

$$m_1 = m_2$$   
    
Perpendicular lines have negative reciprocal slopes and intersect at a single point, if:    

$$m_1 = 3 \;and\; m_2 = \frac{-1}{3}$$   
    
All other lines intersect at one point.

Flashcard 6 - Math Flashcard Set for the ACT

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