The Graph of a Function F Is Given $\{ x \mid x \geq 0 \}$

Multiple Choice

The graph of a function f is given. Use the graph to answer the question.
-What is the domain of f?

A) $\{ x \mid x \geq 0 \}$
B) all real numbers
C) $\{ x \mid - 4 \leq x \leq 5.5 \}$
D) $\{ x \mid - 5 \leq x \leq 5 \}$