Let A = {a, b, c} and B = {5, 7, 9}. State, which of the given are relations from B to A.
{ (5, a), (5, b), (5, c) }
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Solution
For a set of ordered pairs to be a relation from B to A, then the
x-coordinates of the ordered pairs should be from B and the y-coordinates
should be from A. Now, in the given set of ordered pairs, the
x-coordinates of the ordered pairs are from set B and the
y-coordinates are from the set A. Hence, the given set of ordered
pairs is a relation from B to A.