Question

T= {(-5, -3), (8, -6), (-5, 1), (0,8)}

Give the domain and range of T.
Write your answers using set notation.

Answer 1

d: {-5, 0, 8}

r: {-6, -3, 1, 8}

Explanation:

You want the domain and range of the relation T= {(-5, -3), (8, -6), (-5, 1), (0,8)}.

Domain

The domain is the set of first values. We usually like to see duplicates eliminated and the values written in increasing order:

{-5, 0, 8}

Range

The range is the set of second values. Again, we like them in order:

{-6, -3, 1, 8}

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Additional comment

If there are duplicates among the domain values (as here), the relation is not a function.