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anonymous

  • one year ago

The domain of the following relation R {(3, −2), (1, 2), (−1, −4), (−1, 2)} is... A. {−1, 1, 3} B. {−1, −1, 1, 3} C. {−4, −2, 2, 2} D. {−4, −2, 2}

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  1. freckles
    • one year ago
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    can you name the x-coordinate of every pair

  2. freckles
    • one year ago
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    that means can you name the first number in every pair

  3. anonymous
    • one year ago
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    :/ Not very sure

  4. freckles
    • one year ago
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    here is a pair (3,-2) which number is first and which number is second?

  5. anonymous
    • one year ago
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    3 is X and -2 is Y?

  6. freckles
    • one year ago
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    yes

  7. freckles
    • one year ago
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    we want to list all of the x coordinates of every pair for the domain

  8. freckles
    • one year ago
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    so 3 is going to be in the domain

  9. freckles
    • one year ago
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    what about looking at the pair (1,2)?

  10. anonymous
    • one year ago
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    1 would be the domain?

  11. freckles
    • one year ago
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    yes 1 is going to be in the domain

  12. freckles
    • one year ago
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    so far we have 1,3 are in the domain

  13. freckles
    • one year ago
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    what about (-1,-4)?

  14. anonymous
    • one year ago
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    -1 would be the Domain so 1, 3 and -1 would be in the pot?

  15. freckles
    • one year ago
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    yes -1,1,3 are all going to be in the pot

  16. anonymous
    • one year ago
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    xD Thank you btw medal :P

  17. freckles
    • one year ago
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    by the way there isn't a real difference from A and B A is less redundant so I would go with A because there is no reason to repeat an element twice

  18. freckles
    • one year ago
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    anyways you did great so you get a medal too

  19. anonymous
    • one year ago
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    Thank's :D

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spraguer (Moderator)
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