6
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-0.25
(Perpendicular lines on an x-y graph have negative reciprocal slopes.
The given line has slope=4, so any line perpendicular to it has slope=-1/4.)
4y= -3x + 12 y = -3/4x + 3 The perpendicular slope is 4/3
3x-4y-6 = 0
y = -4x
The slope is -4
4x-5y = 13 -5y = -4x+13 y = 4/5x-13/5 Slope = 4/5 or 0.8