What is the equation of the normal to the parabola y2=8xy^2 = 8xy2=8x at the point (2,4)(2, 4)(2,4)?
x+y=6x + y = 6x+y=6
x+y=2x + y = 2x+y=2
x−y=6x - y = 6x−y=6
x+y=4x + y = 4x+y=4