9.3 Reflections across four common axes 

Reflections in the coordinate plane for High School Geometry.
Use the coordinate rules to reflect one pre-image across four common axes.
Use the coordinate rules and graph images.
Reflect across the x-axis: (a,b) to (a,-b)
Reflect across the y-axis: (a,b) to (-a,b)
Reflect across y = x: (a,b) to (b,a)
Reflect across y = -x: (a,b) to (-b,-a)