### Home > CC4 > Chapter 2 > Lesson 2.1.3 > Problem 2-34

2-34.

Which graphs below have a domain of all real numbers? Which have a range of all real numbers? Which are functions? Homework Help ✎

In which graph do all values of

*x*have a corresponding*y*-value?

Refer to the Math Notes box in Lesson 1.2.5.Graphs (a) and (b)

In which graphs do all values of

*y*have a corresponding*x*-value?Graphs (a) and (c)

A function can only have one

*y*-value for each*x*-value.