How do you find the domain and range and determine whether the relation is a function given {(2,1), (-3,0), (1,5)}?

1 Answer
Daniel L.
Jun 30, 2017

See explanation.

Explanation:

The domain is the set of 1st coordinates in the pairs' set.

Here we have D={−3,1,2}

The range is the set of 2nd coordinates in pairs.

Here it is:

R={0,1,5}

The condition of being a function is:

For each argument in the domain there must by only one value assigned to it.

Here this condition is met.

If we added for example a pair (1,0) then the new relation would not be a function because it would have 2 values 0 and 5 both assigned to the same argument (1).

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