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anonymous

  • one year ago

How do I list the elements of the domain as a set and the elements of the range as a set? Also, is it a relation or a function? {(1,2), (2,4), (3,6), (4,8)}

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  1. anonymous
    • one year ago
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    Ok first do you know what the domain is?

  2. anonymous
    • one year ago
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    nope

  3. anonymous
    • one year ago
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    Ok the domain is a list of all x-values, so here what are they.

  4. anonymous
    • one year ago
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    I think I need to just youtube the session on this all together lol

  5. anonymous
    • one year ago
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    ok this is easy just hang on

  6. anonymous
    • one year ago
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    you can do this

  7. anonymous
    • one year ago
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    {(1,2), (2,4), (3,6), (4,8)} {(x,y), (x,y), (x,y), (x,y)}

  8. anonymous
    • one year ago
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    does that make sense?

  9. anonymous
    • one year ago
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    kind of

  10. anonymous
    • one year ago
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    do I add the x's together and the y's together?

  11. anonymous
    • one year ago
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    so the first number in the coordinate is an x-value and the second number is a y-value. No we are not adding

  12. anonymous
    • one year ago
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    We are first finding the domain: all x-values: {1,2,3,4} Do you see how I got this?

  13. anonymous
    • one year ago
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    yes those are all of the xs

  14. anonymous
    • one year ago
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    wait, so that's it? there is no more work to it?

  15. anonymous
    • one year ago
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    ok, what do you do once you've found the domain and the y values?

  16. anonymous
    • one year ago
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    awesome now the range: all the y-values: {2,4,6,8}

  17. anonymous
    • one year ago
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    ok so so far we have: domain: {1,2,3,4,} range: {2,4,6,8} Now we need to determine whether it is a relation or a function

  18. anonymous
    • one year ago
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    ok, so how do you do that? because for some reason I want to say it is a function...

  19. anonymous
    • one year ago
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    A function is a set of ordered pairs in which each x-element has only ONE y-element associated with it. So none of the x-values can be the same. So is this a function? Let's see if you can figure this out..

  20. anonymous
    • one year ago
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    We look at the domain, are any of those numbers the same?

  21. anonymous
    • one year ago
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    the numbers in the domain are not the same but the ones in the range are, right?

  22. anonymous
    • one year ago
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    ok, no that is not what we are looking for. to determine if it is a function, all we have to do is see if any of the x-values are the same, here are the x-values {1,2,3,4,} are any of them the same?

  23. anonymous
    • one year ago
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    I want to say 2 and 4 are but that's not right

  24. anonymous
    • one year ago
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    lol are any of the numbers physically the same? it is simple 1, 2, 3, 4 are any of those numbers the same number?

  25. anonymous
    • one year ago
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    oh lol im not smart. No, none of them are the same

  26. anonymous
    • one year ago
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    awesome so that means that this is a function: so this is what we have- domain: {1,2,3,4} range: {2,4,6,8} relation or function: function

  27. anonymous
    • one year ago
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    thanks for putting up with me haha

  28. anonymous
    • one year ago
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    lol no problem

  29. zzr0ck3r
    • one year ago
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    every function is a relation, not every relation is a function So this is a function AND a relation.

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