Domain of a Function

The graph of a function is shown:

What is the domain of the function?
A.)  x ≥ -4
B.)  x ≥ -2
C.)  x ≥ 0
D.)  x ≥ 1

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The domain of a function is the set of x-values.  Graphically, it is the set of x-values used in the construction of the graph.
In the graph, the x-values consist of all real numbers greater than or equal to -4.

A.)  x ≥ -4

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