What axis did they reflect triangle ABC over to get triangle A'B'C'?

reflection over the y axis
What is the rule for a rotation of 180 degrees?
(-x, -y)
If you reflect a point over the y-axis which coordinate changes? What changes about it?
The x coordinate changes and it becomes the opposite sign.
For the transformation shown at the right, what is the measure of the angle of rotation of ABCD about the origin?
90 degrees clockwise
Daily Double!!!!!!!!!!!!!!!! Reflect: (-3, 2) over the x-axis.
What is (-3,-2)?
If point B is rotated 180 degrees, what quadrant will B' end up in?
Quadrant 2
Reflect: (5, 0) over the x-axis.
(5,0)
Daily Double!!!!!!!!!! Rotate the point (-1,-3) 90 degrees.
(3,-1)
Reflect these points over the x-axis.
A(1, -2)
B(-4, 3)
C(-5, -6)
A'(1, 2)
B'(-4, -3)
C'(-5, 6)
Triple Points!!!!!!!!!!! Rotate the point (-1,3) 270 degrees.
(3,1)