## anonymous one year ago Which of the sets of ordered pairs represents a function? A = {(−4, 5), (1, −1), (2, −2), (2, 3)} B = {(2, 2), (3, −2), (9, 3), (9, −3)} @pooja195

1. Nnesha

in order to relation be a function x values shouldn't repeat

2. anonymous

3. anonymous

Which of the sets of ordered pairs represents a function? A = {(−4, 5), (1, −1), (2, −2), (2, 3)} B = {(2, 2), (3, −2), (9, 3), (9, −3)} Only A Only B Both A and B Neither A nor B

4. Nnesha

(x,y) first number represent x-coordinate

5. anonymous

6. Nnesha

why is it not A ?

7. anonymous

because on this group : A = {(−4, 5), (1, −1), (2, −2), (2, 3)} , the number 2 appears twice in the x coordinate @Nnesha

8. Nnesha

yep that's right!! so now focus on B set

9. anonymous

?

10. Nnesha

2 appears twice in first set right now Set B is there any x number that appears more than onc ?

11. anonymous

no

12. Nnesha

mhmm

13. anonymous

so group B is the only function?

14. Nnesha

$\huge\rm B = {(\color{reD}{2}, 2), (\color{reD}{3}, −2), (\color{reD}{9}, 3), (\color{reD}{9}, −3)}$ any x values appears more than once ?

15. anonymous

oh oops! yes

16. Nnesha

^

17. anonymous

so D?

18. Nnesha

yep

19. anonymous

k. thx can u help with a couple more? @Nnesha

20. Nnesha

i'll try.