A dilation centered at (1,2)(1, 2)(1,2) with k=3k=3k=3 maps point (x,y)(x, y)(x,y) to (x′,y′)(x', y')(x′,y′). What is x′x'x′ in terms of xxx?
3x−23x - 23x−2
3x+23x + 23x+2
3x−33x - 33x−3
3x+13x + 13x+1