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How to Reflect Points on a Coordinate Plane
Transcript of How to Reflect Points on a Coordinate Plane
Reflecting points across an axis is like creating a mirror image.
The x-axis is the horizontal axis.
The y-axis is the vertical axis.
When reflecting over the y-axis the sign of the x-value changes. The sign of the y-value never changes.
When reflecting points over the x-axis, the sign of the y-value changes. The sign of the x-value never changes.
(2,1) reflected over the x-axis becomes (2,-1).
(4,-3) reflected over the x-axis becomes (4,3).
For example: Create one half of a butterfly on the positive side of the x-axis, and reflect the half of the butterfly over the y-axis so that you have created a complete butterfly.
The origin point will stay at (0,0) when reflecting across the y or x-axis.
Try to reflect (3,5) over the x-axis .
(4,2) reflected over the y-axis is (-4,2).
(-5,1) reflected over the y-axis is (5,1).
Try to reflect (3,3) over the y-axis.
Create a drawing on graph paper using
reflection and symmetry.