You can try the points and see which satisfy the relation. I find it easier to consult a graph of the solution set and the offered points.
The appropriate choice is ...
... C: (1, 0) . . . . . . . on the boundary of the solution set.
Which ordered pair could be removed from the graph to create a set of ordered pairs that represents a function? (–4, 2) (–1, 4)
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