Question

What is the range of the relation {(1, 2), (2, 4), (3, 2), (4, 6)}?

O {1, 2, 3, 4)
O {2, 4, 6}
O (2, 4)
O {1, 2, 3, 4, 6}​

Answer 1

(b) {2, 4, 6}

Explanation:

You want the range of the relation {(1, 2), (2, 4), (3, 2), (4, 6)}.

Range

The range of a relation is the set of possible output values. When values are listed as ordered pairs, it is the set of second numbers of those pairs.

The list of second numbers is ...

2, 4, 2, 6

When these are expressed as a set, duplicates are removed, and they are listed in order:

{2, 4, 6} . . . . the range of the relation