Aim: How do we graph transformations that are reflections ?

• Reflections is one of the  functions in Transformations. 
• You can go by the definition of Line Reflection:

                                          - A transformation that creates figures which are mirror images of the original.      

                                         
                     

If you look closely at the bubble,
it shows a line of symmetry going horizontally.
That's why the house looks kind of twisted !

                                              


                             

                                    * Trick Rule: -Over the x axis (x,y) -->> (x,-y)   

                                                                           -Over the y axis (x,y) -->> (-x,y)                                                

                

• and the definition of Reflection itself: 

                                          - When a figure is flipped over a line of symmetry. 

    

The red line that goes horizontally
is the line of symmetry to the triangle. 

                 


                    

                       So when you transform a figure by reflection, you use the Line Reflection rule on the point(s). 


Now try it, with this ! *pointing down*