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Mathematics 9 Online
OpenStudy (anonymous):

Which line is perpendicular to the line y =1/2 x + 6 ?

OpenStudy (anonymous):

-2x+6?

OpenStudy (anonymous):

how did the 1/2 turn into -2

OpenStudy (anonymous):

"two lines are perpendicular if and only if their slopes are negative reciprocals of each other."

OpenStudy (anonymous):

oh ok thank you

OpenStudy (austinl):

http://www.mathsisfun.com/algebra/line-parallel-perpendicular.html This may help.

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