College Algebra / Unit 3 Alg 121 short lesson, about 20 seconds
The Cartesian Coordinate System
Captions available
The idea
The Cartesian coordinate system crosses a horizontal x-axis with a vertical y-axis at the origin, locating every point in the plane by an ordered pair (x, y).
In practice
Legend has René Descartes tracking a fly on his ceiling and locating it by its distances from two walls — two numbers, one point.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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