1. In which set of ordered pairs is y a function of x? A. {(1, 2), (0, 1), (0, 2), (1, 1)}
B. {(4, 1), (3, 1), (2, 1), (1, 1)}
C. {(1, 4), (1, 3), (1, 2), (1, 1)}
D. {(2, 5), (3,6), (6,5), (2, 7)}

Please help :(

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

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