If a line has equation y = mx + c, the perpendicular line has gradient -1/m
A line perpendicular to 3x + y = 2 has equation 3y = x + c; the value for c will be determined by a point through which the line must pass.
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3x+y = 4 y = -3x+4 Perpendicular slope: 1/3
4y= -3x + 12 y = -3/4x + 3 The perpendicular slope is 4/3
3X + 5Y = 155Y = -3X + 15Y = (-3/5)X + 3The slope of this line is -3/5.The slope of a line perpendicular to it is 5/3.
y equals -1/3x plus 4/3
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