Write the equations of a line which passes through origin and points on the line lie in second and fourth quadrant.
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any line passing through the origin will be of the form y=mx+c
m is slope of the line
in second quadrant
x<0 and y>0 so line will be y=-mx+c
in fourth quadrant
x<0 y<0 so line will be -y=-mx+c
m is slope of the line
in second quadrant
x<0 and y>0 so line will be y=-mx+c
in fourth quadrant
x<0 y<0 so line will be -y=-mx+c
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