What stays the [b]same[/b] and what [b]changes[/b] as you move the points around?[br]Where would the co-ordinate (x,y) map to?[br][br]隨著點的移動，什麼保持不變，什麼改變？[br] 坐標（x，y）會映射到哪裡？[br]

[color=#0a971e]Created by N.Trubridge[/color]