College Algebra / Unit 5 Alg 231 short lesson, about 20 seconds
Relations
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The idea
A relation is a set of ordered pairs; its domain is the set of first coordinates, and its range is the set of second coordinates.
In practice
{(1, 2), (3, 6), (5, 10)} is a relation with domain {1, 3, 5} and range {2, 6, 10}.
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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