Which of the following would be a line of reflection that would map ABCD onto itself?

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

Can someone answer this question? : )

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)