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

Question

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

anonymous · Answer

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

anonymous · Answer

But why?

anonymous · Answer

what means ..??why..??

anonymous · Answer

welcome to open study..

anonymous · Answer

Why is the answer c?
I need to know how to do the question, not just the answer. @zaibali.qasmi

anonymous · Answer

okay..listen...

any set of order pair will represent a function if any of coordinate in order pairs in one set is not repeating..if different input values gives one result they are not function..!!

anonymous · Answer

or one vvalue gives different reult then it is not a function too..!

anonymous · Answer

So why isn't d a function? I know b and c are and a isn't.

anonymous · Answer

cause given sets have four entries each so resulting function willhave four order pairs..!!that are all independent..

anonymous · Answer

Thank you.

anonymous · Answer

you welcome..!