Posted by **dennis** on Tuesday, February 5, 2008 at 11:45am.

determine which two represent perpendicular lines; y=6x-3,y=1/6x+3, y=-1/6+3, or y=1/6x-3.

- algebra -
**drbob222**, Tuesday, February 5, 2008 at 11:50am
To be perpendicular, one equation must have a slope that is the negative of the reciprocal of the other. The slope of the first one is 6, the second is 1/6, the third is -1/6, the fourth is 1/6.

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