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OpenStudy (anonymous):
Which of the following relations is a function? A. {(-4, 3), (-4, 2), (1, 9), (6, 7)} B. {(-4, 3), (-2, 0), (2, 7), (3, 9)} C. {(2, 1), (4, 2), (2, 3), (8, 4)} D. {(0, 0), (0, 1), (2, 3), (4, 5)}
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OpenStudy (mathstudent55):
In each choice, if you see the same x-coordinate used more than once, it is not a function.
OpenStudy (anonymous):
b?
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