# Precalculus Examples

,

Since there is one value of for every value of in , this relation is a function.

The relation is a function.

The domain is the set of all the values of . The range is the set of all the values of .

Domain:

Range:

Since there is one value of for every value of in , this relation is a function.

The relation is a function.

The domain is the set of all the values of . The range is the set of all the values of .

Domain:

Range:

The domain of the first relation is equal to the range of the second relation . Also, the range of the first relation is equal to the domain of the second relation , which means that is the inverse of and vice versa.

is the inverse of