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Plotting and Reflecting Points on the Coordinate Grid

Algebra and Graphs Plotting and Reflecting Points on the Coordinate Grid

🎬 Video Tutorial

(0:01) 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).
(0:34) 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.
(2:00) Reflecting Points: Reflecting over the y-axis changes the x-coordinate’s sign. Reflecting over the origin changes both signs.
(3:06) Reflecting Shapes: To reflect a shape, reflect each vertex (point) over the desired axis, then connect the points to form the mirrored shape.

📂 Revision Cards

Coordinate system graph showing positive and negative numbers, with the origin marked at (0,0).

Locating points on a coordinate system with positive and negative coordinates.

Explanation on how to reflect (-3, 2) on a coordinate grid across the y-axis to (3, 2), by changing the sign of x.

Explanation on how to reflect (-3, 2) on a coordinate grid across the x-axis to (-3, -2), by changing the sign of y.

Explanation on how to reflect (-3, 2) on a coordinate grid across the origin to (3, -2), by changing both the signs of x and y.

Reflecting a triangle over the y-axis by changing the sign of the x-coordinate of all points.

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