What is the equation of the directrix of the parabola (y−2)2=8(x−1)(y-2)^2 = 8(x-1)(y−2)2=8(x−1)?
x=−1x = -1x=−1
x=1x = 1x=1
x=−3x = -3x=−3
x=0x = 0x=0