The document discusses parallel and perpendicular lines. Parallel lines have equal slopes and are never perpendicular. Perpendicular lines have slopes that are negative reciprocals of each other. Neither parallel nor perpendicular lines have no relationship between their slopes and are simply not parallel or perpendicular. The document provides examples of finding the slopes of lines parallel and perpendicular to given lines. It includes a practice quiz with problems finding slopes of parallel and perpendicular lines.

1. #1 Finding slopes of parallel and perpendicular lines.
Neither Parallel nor
Parallel Lines Perpendicular Lines
Perpendicular is called
________ _____________
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Two lines that Two lines that Two lines that
Described as…
_____________________ _____________________ _____________________
Looks like…
Symbol
No Symbol!
Sample Equations
The Tricky Ones…
Key Word to Remember
Perpendicular Perpendicular
Given Equation Slope Parallel Slope Given Equation Slope Parallel Slope
Slope Slope
Chapter 5 SSS 2

2. NOTE: In Standard Form (Ax + By = C), the slope is Example:
Perpendicular Perpendicular
Given Equation Slope Parallel Slope Given Equation Slope Parallel Slope
Slope Slope
PRACTICE QUIZ #1
Find the slope of a line parallel to the given line.
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Find the slope of a line perpendicular to the given line.
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Chapter 5 SSS 3