What is the fixed point of the dilation (x,y)→(3x,3y)(x, y) \rightarrow (3x, 3y)(x,y)→(3x,3y) centered at the origin?
(0,0)(0, 0)(0,0)
(1,1)(1, 1)(1,1)
(3,3)(3, 3)(3,3)
Any point on line y=xy = xy=x