### Home > CAAC > Chapter 12 > Lesson 12.4.3 > Problem 12-90

12-90.

The graphs of several relations are shown below. Decide if each is a function. If the relation is not a function, explain why not.

A relation is only a function if there is only one

-value for each-value. Are there any-values on this graph that have multiple-values?This relation is a function.

See the help for part (a).

This relation is not a function. Be sure to explain why.

See the help for part (a).