# Numbers on a number line

Understand a coordinate system defined by two perpendicular number lines (axes) with an origin at (0,0); know that an ordered pair (x, y) specifies a unique point where the first number gives horizontal distance and the second gives vertical distance from the origin

Builds on: Lines, Rays & Angles (hard, https://ai.page/c/lines-rays-and-angles/en.md)

Concept id: numbers-on-a-number-line-2. Subject: maths. Licence: CC BY-SA 4.0.

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