trapezoid abcd is shown. a is at negative 5, 1. b is at negative 4, 3. c is at negative 2, 3. d is at negative 1, 1.
trapezoid abcd is rotated 90° clockwise. what rule shows the input and output of the reflection, and what is the new coordinate of a′?
(x, y) → (−x, −y); a′ is at (5, −1)
(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)