Question

Which sets of ordered pairs represent functions from A to B?
A={10, 20, 30, 40} B={0, 2, 4, 6}

Answer 1

You may have some options, I guess, if it is, post it, please.

Answer 2

a. {(20, 4), (40, 0), (20, 6), (30, 2)}
b. {(10, 4), (20, 4), (30, 4), (40, 4)}
c. {(40, 0), (30, 2), (20, 4), (10, 6)}
d. {(20, 2), (10, 0), (40, 4)}