12.3. Reflections http://www.ck12.org
Solution:To reflect 4 ABCover they−axis they−coordinates will remain the same. Thex−coordinates will be the
same distance away from they−axis, but on the other side of they−axis.
A( 4 , 3 )→A′(− 4 , 3 )
B( 7 ,− 1 )→B′(− 7 ,− 1 )
C( 2 ,− 2 )→C′(− 2 ,− 2 )
From this example, we can generalize a rule for reflecting a figure over they−axis.
Reflection over they−axis:If(x,y)is reflected over they−axis, then the image is(−x,y).