What's the domain of this function graph?
A)
[0,∞)
B)
(–∞, 0)
C)
[1,∞)
D)
(–∞,∞)

Answer:
A) [0,∞)
Step-by-step explanation:
The domain is the horizontal extent of the graph.
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The given graph goes no farther left than x=0. It extends to infinity to the right (as signified by the arrow pointing right).
The domain is [0, ∞).