Question

A segment with endpoint A( 3,1) and B(-1,-1) is rotated 90 degrees about the origin. What are the coordinates of A' and B'?
1- A (1,-3) and B (-1,-1)
2- A (-1,3) and B (1,-1)
3- A (-1,-3) and B (1,1)
4- A (-3,-1) and B (1,1)
Thanks for looking. Need ASAP!!
Believe it is 3?!?!? Don't know though?

Answer 1

A segment with endpoint X(-6,2) and Y (-1,-3) is rotated 90 degrees about the origin. What are the coordinates of X' and Y'?
A- X(-1,-3) and Y(-6,2)
B- X(2,6) and Y(-3,1)
C- X(-2,-6) and Y(3,-1)
D-X (6,-2) and Y (1,3)

Answer 2

For question #2 I believe it is A?!?!? Don't know though.