Understanding the Coordinate Plane: The coordinate grid has two perpendicular axes, the x-axis (horizontal) and the y-axis (vertical), intersecting at the origin (0,0).

Plotting Points Examples: To plot a point like (2,1), locate 2 on the x-axis and 1 on the y-axis, then mark the intersection. For (-3,-1), find -3 on the x-axis and -1 on the y-axis, and mark their crossing.

Reflecting Points: Reflecting over the y-axis changes the x-coordinate’s sign. Reflecting over the x-axis changes the y-coordinate’s sign. Reflecting over the origin changes both signs.

Reflecting Shapes: To reflect a shape, reflect each vertex (point) over the desired axis, then connect the points to form the mirrored shape.

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