### Home > CC4 > Chapter 1 > Lesson 1.2.2 > Problem 1-47

1-47.

Which of the relationships below are functions? If a relationship is not a function, give a reason to support your conclusion. Homework Help ✎

There is more than one output value for some inputs; therefore, the relation is not a function.

**input (****x****)****output (****y****)**–3

19

5

19

19

0

0

–3

It is a function. Every input had only one output even if it is the same output such as 19.

**input (****x****)**7

–2

0

7

4

**output (****y****)**10

0

10

3

0

There is more than one output value for *x* = 7. Is this relation a function?

It is a function.