What is the slope of a line perpendicular to a line with slope 5?
Parallel and Perpendicular Warm-up

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Mathematics
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The slope of a line perpendicular to a line with slope 5 is -1/5.
2.
FLASHCARD QUESTION
Front
Back
3.
FLASHCARD QUESTION
Front
If two lines have the same slope, what can we say about their relationship?
Back
If two lines have the same slope, they are parallel.
4.
FLASHCARD QUESTION
Front
Back
5.
FLASHCARD QUESTION
Front
What is the relationship between the slopes of two perpendicular lines?
Back
The slopes of two perpendicular lines are negative reciprocals of each other.
6.
FLASHCARD QUESTION
Front
Back
7.
FLASHCARD QUESTION
Front
What can we conclude if two lines have slopes of 2 and -1/2?
Back
The lines are perpendicular because their slopes are negative reciprocals.
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