Which of the following is a function? A. (-2,3), (0,3), (1,6), (1,-6) B. (-2,4), (0,3), (1,6), (-1,2) C. (1,3), (2,4), (1,5), (2,3) D. (1,-1), (2,-2), (1,-3), (4,-4)

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asked Dec 27, 2020 57.9k views

2 Answers

Tu Bui · Answer 1 · 2021-01-02T05:38:33+0000

Answer:

B. (-2,4), (0,3), (1,6), (-1,2)

Explanation:

The list of first numbers for a function is a list of unique numbers.

A: 1 is repeated

B: the 4 pairs have 4 different first numbers: {-2, -1, 0, 1}

C: 1 and 2 are repeated

D: 1 is repeated