Which set of ordered pairs in the form of (x, y) does not represent a function of x? A. { (1, 1.5), (2, 1.5), (3, 1.5), (4, 1.5) } B. { (0, 1.5), (3, 2.5), (1, 3.3), (1, 4.5) } C. { (1, 1.5), (-1, 1.5), (2, 2.5), (-2, 2.5) } D. { (1, 1.5), (-1, - 1.
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