PDF chapter test TRY NOW

Let \(A = \{1, 2, 3, 4\}\) and \(B = \{4, 8, 9, 10\}\). A function \(f : A \rightarrow B\) given by \(f = \{(1, 4), (2, 8), (3, 9), (4, 10)\}\) is a: