(x, y) — René Descartes' way of putting numbers on a plane. x is horizontal, y is vertical.
Descartes invented these in the 1600s — and unified algebra with geometry overnight.
(x, y) — René Descartes' way of putting numbers on a plane. x is horizontal, y is vertical.
Descartes invented these in the 1600s — and unified algebra with geometry overnight.