How do we graph Rotations?

Describing a rotaion or a turn
1) An angle of rotation
2) A direction (Clockwise or Counter Clockwise)
3) A center of rotation

90degrees                      180degrees                      270degrees
(A,B)--> (-B,A)             (A,B)--> (-A,-B)             (A,B)--> (B,-A)
Ex:(2,5) --> (-5,2)          Ex: (5,2)--> (-5,-2)          Ex: (5,4)--> (4,-5)

Aim:How do we graph transformations that are reflections?

Line reflection: (Flip) A transformation that creates figure which are mirror images:
Rules for a reflection in the
 X-axis (x,y)--> (x,-y)
Y-axis: (x,y)--> (-x,y)