If A={1,m,n,o} and B={10,20,30,40}, is the set of ordered pairs {(1,30),(m,20),(n10)} a function from set A to

Question

If A={1,m,n,o} and B={10,20,30,40}, is the set of ordered pairs {(1,30),(m,20),(n10)} a function from set A to set B? Why or why not?

Answer 1

No, because o does not participate in an ordered pair.