Plot points on coordinate axes. Learn x- and y-axis, quadrants, and reflections so you can read and draw coordinates accurately in GCSE Foundation Maths.
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Fascinating Fact:
For a mirror puzzle, reflecting across the x axis flips the height only. Example: (4, 3) becomes (4, −3).
In GCSE Maths, you use the coordinate plane to locate and describe positions. You’ll read and plot coordinates, identify quadrants, use the origin and axes correctly, and reflect points across the x- or y-axis.
Key Terms
Origin: The point (0, 0) where the x-axis and y-axis cross.
Coordinate: An ordered pair (x, y) showing horizontal then vertical position.
Quadrant: One of four regions of the plane, split by the axes.
Frequently Asked Questions (Click to see answers)
How do I plot a coordinate like (−2, 4)?
Start at the origin. Move 2 units left along the x-axis (because x is −2), then 4 units up along the y-axis. Place the point there.
What happens when a point is reflected in the x-axis?
The x-value stays the same and the y-value changes sign. So (a, b) becomes (a, −b).
How do I know which quadrant a point is in?
Use signs: I (+,+), II (−,+), III (−,−), IV (+,−). Points on an axis are not in any quadrant.