Question

Which set of ordered pairs represents a function?

o {(1,3) (2,5) (4, 9) (4, 13)}
o {(1,3) (1,5) (4, 9) (6,3)}
o {(1,3) (2,5) (2,9) (6, 13)
o {(1,3) (2,5) (4,9) (6,5)}
pls help

Answer 1

The last answer because the domain (x) does not repeat itself! If you ever see the first letter repeat, that’s not a function! :)