6-2: Reflection Reflection in the Coordinate Plane: What is Reflection? over the x-axis: (x, y) (x, -y) over the y-axis: (x, y) (-x, y) 1/30/15 To reflect a figure over the x-axis, multiply the ycoordinate by -1. To reflect a figure over the y-axis, multiply the xcoordinate by -1. a A reflection is a mirror of the original figure. What is a Line of Reflection? It is the result of a transformation of a figure over a line called a line of reflection. Example 1-2a: Page 463: Summary: Triangle PQR has vertices P(5, 1), Q(3, 7), and R(4, -1). Graph the figure and its reflection over the yaxis. Then find the coordinates of the reflected image. Example 3b: Page 464 Summary: The figure at right is reflected over the xaxis. Find the coordinates of point A’ and point B’. Then sketch the image on the coordinate plane.
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