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

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

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