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4 votes
Which relation is not a function?

A. {(2, 4), (1, 2), (0,0), (-1,2), (-2,4)}
B. {(2,4), (1, 1), (0,0), (-1, 1), (-2,4)}
C. {(2, 2), (1, 1), (0,0), (-1,1), (-2, 2)}
D. {(2, 2), (1, 1), (0,0), (1,-1), (2,-2)}

User Lexpj
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2 Answers

4 votes

Answer:

the correct is C. because they are lines going to 2.

User Cerealex
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4 votes

Answer: Choice D

Step-by-step explanation:

We have the two points (2,2) and (2,-2) which have a repeated x coordinate. This is not allowed if we wanted a function. A function must have any x input lead to exactly one and only one output (assuming the input is in the domain).

User Karty
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7.2k points
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