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The slope of a line is -3. Find the slope of a line that is perpendicular to this line. A) -3 B) -1/3 C) 1/3
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The slope of a line is -3. Find the slope of a line that is perpendicular to this line. A) -3 B) -1/3 C) 1/3

User DavidDunham
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1 Answer

5 votes
For lines to be perpendicular their slopes must be negative reciprocals of one another, mathematically:

m1*m2=-1

In this case the perpendicular line will have a slope that satisfies:

-3m=-1 divide both sides by -3

m=-1/-3

m=1/3
User Adel Elkhodary
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