Question

Which relation is a function?

Answer 1

The relation which is a function is; Choice A; {(6, −4), (5, 8), (−3, 6), (−4, −4)}

What is a function?

In mathematics, a function from a set of values for variable x to a set of values for variable y assigns to each element of x only one element of y. The set X is called the domain of the function and the set Y is called the codomain of the function.

On this note, since in Choice A, each x-value is mapped distinctively to one value of y, Choice A is a function.

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