[Md. Minuddin]

Originally Posted by EbrahimHashem

For the line whose equation is (y+2-b)/x=m +(2/x), m is not zero. If the line is rotated 90 degrees, then the slope of the line would be

(A) 1/m
(B) -1/m
(C) m
(D) -m
(E) m-2


HAVE FUN!

If two line are perpendicular then the product of their slop is -1

here the equation is
(y+2-b)/x=m +(2/x)
Or,y+2-b=m x+2
Or, y=m x+b
Its slop is m


Let the slop of line perpendicular to it is m₁
So, mm₁=-1
Or,m₁=-1/m