What is the domain of the relation r: { (3, - 2), (1, 2), (-1, - 4), (-1, 2) }? Is it a function? {-1, 1, 3}; no {-1, - 1, 1, 3}; yes {-4, - 2, 2 2}; no {-4, - 2, 2}; yes?

Question

Mathematics

Alina

16 January, 18:08

What is the domain of the relation r: { (3, - 2), (1, 2), (-1, - 4), (-1, 2) }? Is it a function? {-1, 1, 3}; no {-1, - 1, 1, 3}; yes {-4, - 2, 2 2}; no {-4, - 2, 2}; yes?

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Answers (1)

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Red Velvet · Answer 1

The list of first values of the ordered pairs is {3, 1, - 1, - 1}. When put into order, they are {-1, 1, 3}. Since one is repeated, the relation is NOT a function.

The appropriate choice is the first one:

... {-1, 1, 3}; no