If: y = 2/5x+10 then the perpendicular slope is -5/2x or -2.5x
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The slope of the perpendicular is -(1/2) .
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If the line has a slope of 2, then the perpendicular line has a slope of -1/2. The slope of a perpendicular line is the negative reciprocal. Another example would be if the slope of a line is -1/4, then the slope of the perpendicular is 4.
4x+2y = 6 2y = -4x+6 y = -2x+3 Perpendicular slope is 1/2
The slope of a perpendicular line is not defined.