Point (9,3)(9, 3)(9,3) is reflected across the line y=xy=xy=x. What are the new coordinates?
(−3,−9)(-3, -9)(−3,−9)
(−9,3)(-9, 3)(−9,3)
(9,−3)(9, -3)(9,−3)
(3,9)(3, 9)(3,9)