Coordinates

MathematicsAQAEdexcelGCSEUnit: Graphs
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The basics

Treasure Hunt with Coordinates

🗺️ Treasure Hunt with Coordinates

Imagine you're a pirate following a treasure map. The map is divided into a grid, and each location is described by two numbers - how far across and how far up. These numbers are called coordinates, and they're the foundation of all graph work in maths!

In 1637, French mathematician René Descartes invented this coordinate system while lying in bed watching a fly crawl across his ceiling tiles.

What are coordinates?: A pair of numbers (x, y) that describe the exact position of a point on a coordinate plane.
Key terms

Mathematics glossary

What are coordinates?
A pair of numbers (x, y) that describe the exact position of a point on a coordinate plane.
Which axis is vertical?
The y-axis is the vertical axis (runs up and down).
Exam tip

Earn the mark scheme marks

💡 Exam Tips

  • Remember the order: Coordinates are always (x, y) - "across then up"
  • Check quadrants: Use signs to verify your plotted points are in the correct quadrant
  • Use graph paper: When drawing coordinate grids, make sure scales are equal
  • Label your axes: Always mark x and y axes clearly
  • Show working: For distance and midpoint calculations, substitute values clearly

Now try it yourself

Quiz · Question 1 of 10

Which point has coordinates (–3, 5)?

Tap an answer to check it

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