Question

How do you find the domain and the range of the relation, and state whether or not the relation is a function {(5, –4), (3, –4), (–5, 3), (–4, 5)}?

Answer 1

Domain: `{5,3,-5,-4}`
Range: `(-4,3, 5}`
The relation is a function since each element of the domain maps into only one element of the range.

Explanation:

A relationship defined by a set of pairs such as
`color(white)("XXX")(x,y) in {(5,-4), (3,-4), (-5,3), (-4,5)}`

has as its Domain the collection of values corresponding to `x`
and as its Range the collection of values corresponding to `y`

The relationship is a function if no value of `x` is paired with more than one value of `y`