Which relation is a function? Question 3 options: { (1, 2); (1, 3); (1, 4); (1, 5) } { (1, 2); (2, 3); (3, 4); (4, 5) } { (1, 2); (3, 2); (3, 3); (4, 2) } { (1, 2); (2, 3); (3, 4); (2, 5) }

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Mathematics

Carlson

14 September, 08:05

Which relation is a function? Question 3 options: { (1, 2); (1, 3); (1, 4); (1, 5) } { (1, 2); (2, 3); (3, 4); (4, 5) } { (1, 2); (3, 2); (3, 3); (4, 2) } { (1, 2); (2, 3); (3, 4); (2, 5) }

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Snuffles · Answer 1

To be a function for every identical x value it has to have a different Y value. If the set has two identical X values but they have different Y values it can't be a function.

The set that is a function is:

{ (1, 2); (2, 3); (3, 4); (4, 5) }