Algebra 1 · Functions & Sequences
Relation
Algebra 1 · Functions & Sequences
Definition
A relation is any set of ordered pairs that pairs input values with output values.
Examples
- {(1,2),(3,4),(5,6)} is a relation.
- A relation may repeat inputs, unlike a function.
Key rule
Every function is a relation, but not every relation is a function.
Memory hook
Relation just pairs things - no one-output rule required.