Re: bisector

slope of the equation y = -2x + 4

slope of rp = 1/2

let p be (x,y)

then equation 1--- (y-1)/(x-4) = 1/2

also mid point lies on y = -2x + 4

so equation 2 -----(y+1)/2 = -2(x+4)/2 + 4

solve for both equations