Question

Let A = {2,4,6} and B = {x,y,z}. State each of the following are relations from A into B.
(ii) R2 = {(4,y), (y,4)}

Answer 1

R2 = {(4,y), (y,4)} is not a relation from A into B (because in the element (y,4) of the set y$\notin$ A and 4$\notin$ B).