Let A = {2, 3, 4,...,15}. Define a relation R from A to A by R = {(x, y); 3x - y = 0, where x, y ∈ A}. Write down its domain, codomain and range.
R = {(2,6), (3,9), (4,12), (5,15)}.
The domain of this relation is {2, 3, 4, 5}
The codomain = {2, 3, 4,...,15}
The range = {6, 9, 12, 15}