Relations Lines Functions

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

• range

• mapping

• function

• coordinate plane

Which of the relations shown represent y as a function of x? Select the correct answer in each row.

Which of the relations shown represent y as a function of x?

Select ONE correct answer in each row.

Answer explanation

In a function, the x does NOT repeat.

Vertical Line Test

- Pass: touches the graph once

- Fail: touches the graph more than once

Which relation shows a function?

• A

• B

• C

• D

Which relation shows a function?

• A

• B

• C

• D

Click the circle to select your answer choice

Which relation shows a function?

• A

• B

• C

• D