A point P(3,2)P(3, 2)P(3,2) is reflected across the line y=−xy = -xy=−x. What are the coordinates of P′P'P′?
(−3,−2)(-3, -2)(−3,−2)
(−2,−3)(-2, -3)(−2,−3)
(2,3)(2, 3)(2,3)
(−2,3)(-2, 3)(−2,3)