Determine Whether the Graph Illustrated Represents a Function $\{ y \mid - 1 \leq y \leq 1 \}$

Multiple Choice

Determine whether the graph illustrated represents a function. Give the domain and range of the relation or function.
-

A) not a function
B) $\{ y \mid - 1 \leq y \leq 1 \}$ domain:domain: $\{ x \mid - \pi \leq x \leq \pi \}$ range:: $\{ x \mid - \pi \leq x \leq \pi \}$ range:range: $\{ y \mid - 1 \leq y \leq 1 \}$
C) function
D) $\{ x \mid - \pi \leq x \leq \pi \}$ domain:main: $\{ y \mid - 1 \leq y \leq 1 \}$ range:range: $\{ \mathrm { y } \mid - 1 \leq y \leq 1 \}$ range:: $\{ x \mid - \pi \leq x \leq \pi \}$