Trapezoid abcd is reflected over the line y = x. what rule shows the input and output of the reflection, and what is the new coordinate of a'? (x, y) → (y, −x); a' is at (1, 5) (x, y) → (y, x); a' is at (1, −5) (x, y) → (−x, y); a' is at (5, 1) (x, y) → (−x, −y); a' is at (5, −1)