Relations and Functions Vocabulary

A set of numbers, or coordinates, written in the form (x, y).

• ordered pair

• x-coordinate

• y-coordinate

• discrete graph

The y-value of an ordered pair, represents the vertical placement of the point.

• y-coordinate

• discrete graph

• continuous graph

• relation

A set of ordered pairs.

• relation

• domain

• range

• mapping

The set of first numbers (x-values) of the ordered pairs in a relation.

• domain

• range

• mapping

• function

The relation ​ (a)   a function.

• is not

• is

The set of second numbers (y-values) of the ordered pairs in a relation.

• range

• mapping

• function

• coordinate plane

Illustrates how each element of the domain is paired with an element of the range.

• mapping

• function

• y-coordinate

• x-coordinate

A relation in which each element of the domain is paired with exactly one element of the range.

• function

• relation

• domain

• range

A function graphed with a line or smooth curve.

• continuous graph

• relation

• domain

• range

Is the relation in this table a function?

• Yes, each input has exactly one output

• No, each input has more than one output

• No, the cost of the movies is different

• Yes, each output has exactly one input