- Five points are plotted on the coordinate plane.Geogebra Applet (Links to an external site.)Links to an external site.
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- Using the Pen tool or the Text tool, label each with its coordinates.
- Using the xx-axis as the line of reflection, plot the image of each point.
- Label the image of each point using a letter. For example, the image of point AA should be labeled A′A′.
- Label each with its coordinates.

- If the point (13,10)(13,10) were reflected using the xx-axis as the line of reflection, what would be coordinates of the image? What about (13,-20)(13,-20)? (13,570)(13,570)? Explain how you know.
- The point RR has coordinates (3,2)(3,2).
- Without graphing, predict the coordinates of the image of point RR if point RR were reflected using the yy-axis as the line of reflection.
- Check your answer by finding the image of RR on the graph.
- Label the image of point RR as R′R′.
- What are the coordinates of R′R′?

- Suppose you reflect a point using the yy-axis as line of reflection. How would you describe its image?