A function is a relation (rule) that assigns each element in the domain to exactly one element in the range. Domain. The set of all the values which may be input into a function. That is, the set of all the values the independent variable may assume.
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A function is a relation (rule) that assigns each element in the domain to exactly one element in the range. Domain. The set of all the values which may be input into a function. That is, the set of all the values the independent variable may assume.