### Home > CCA > Chapter 1 > Lesson 1.2.5 > Problem 1-78

1-78.

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.

**x****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.

**x**7

−2

0

7

4

**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.