### Home > CCA > Chapter 2 > Lesson 2.1.1 > Problem 2-9

2-9.

Which of the relations below are functions? Justify your answer.

Do all of these graphs have one output value for every input value?

The domain of a graph is its possible

-values.All real numbers.

The range of a graph is its possible

-values.

For each graph above, state the domain and range.