Algebra 1 · Functions & Sequences
Function
Algebra 1 · Functions & Sequences
Definition
A function is a relation in which each input value is paired with exactly one output value.
Examples
- {(1,2),(2,4),(3,6)} is a function.
- Each x has only one y.
Key rule
No input may map to two different outputs.
Memory hook
Function = one input, one output. No sharing.