muscrat123
  • muscrat123
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
Mathematics
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SOLVED
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jamiebookeater
  • jamiebookeater
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Nnesha
  • Nnesha
in order to relation be a function x values shouldn't repeat
muscrat123
  • muscrat123
so the answer is b?
muscrat123
  • muscrat123
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

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Nnesha
  • Nnesha
(x,y) first number represent x-coordinate
muscrat123
  • muscrat123
is the final answer B?
Nnesha
  • Nnesha
why is it not A ?
muscrat123
  • muscrat123
because on this group : A = {(−4, 5), (1, −1), (2, −2), (2, 3)} , the number 2 appears twice in the x coordinate @Nnesha
Nnesha
  • Nnesha
yep that's right!! so now focus on B set
muscrat123
  • muscrat123
?
Nnesha
  • Nnesha
2 appears twice in first set right now Set B is there any x number that appears more than onc ?
muscrat123
  • muscrat123
no
Nnesha
  • Nnesha
mhmm
muscrat123
  • muscrat123
so group B is the only function?
Nnesha
  • 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 ?
muscrat123
  • muscrat123
oh oops! yes
Nnesha
  • Nnesha
^
muscrat123
  • muscrat123
so D?
Nnesha
  • Nnesha
yep
muscrat123
  • muscrat123
k. thx can u help with a couple more? @Nnesha
Nnesha
  • Nnesha
i'll try.

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