Position & Direction
Coordinates are an address: across first, then up.
Coordinates in four quadrantsTranslationsReflections in the axes
📖 Learn
(x, y)
Along the corridor, then up the stairs. Negative means left or down.
Translate
Slide every point the same amount: 3 right adds 3 to x.
Reflect
In the y-axis, x changes sign. In the x-axis, y changes sign.
Worked example
Translate (2, −1) by 3 left and 4 up
- 1x: 2 − 3 = −1
- 2y: −1 + 4 = 3
- 3(−1, 3) ✅
🧪 Play with it: Line & grid
y = 1x + 0
Tap the grid to see a point's coordinates.
⭐ Practise
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