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kaylalynn

  • 3 years ago

which is a function?

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  1. kaylalynn
    • 3 years ago
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    \[A. \left[ y \right]\]

  2. ParthKohli
    • 3 years ago
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    The guy which has a unique mapping to it.

  3. Speedy_Jazz
    • 3 years ago
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    do you have a better example?

  4. Dean.Shyy
    • 3 years ago
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    This may help: http://is.gd/PItqZG

  5. Speedy_Jazz
    • 3 years ago
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    That does help Dean,shy

  6. kaylalynn
    • 3 years ago
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    \[A. x=\left[ y \right]\] \[B. y= \left| x \right|\] \[C. x ^{2} + y ^{2} = 49\] \[D. x = y ^{2}\]

  7. nincompoop
    • 3 years ago
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    what would be your answer ?

  8. kaylalynn
    • 3 years ago
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    which ever one is a function. . .

  9. nincompoop
    • 3 years ago
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    which do you think IS a function in the choices you've been provided?

  10. kaylalynn
    • 3 years ago
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    D?

  11. nincompoop
    • 3 years ago
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    why?

  12. kaylalynn
    • 3 years ago
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    because it has a y. lol im so sorry. im tired!!

  13. nincompoop
    • 3 years ago
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    hehehe I don't think you read the attachment that was shared to you. read it a little bit, will you? it will help you answer a lot of problems regarding functions

  14. kaylalynn
    • 3 years ago
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    C?

  15. nincompoop
    • 3 years ago
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    okay, you're just obviously guessing. did you read the attachment?

  16. kaylalynn
    • 3 years ago
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    i did. but none of them look like that. or else i would have known it at first.

  17. nincompoop
    • 3 years ago
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    so what do you understand about function?

  18. nincompoop
    • 3 years ago
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    by the way, do you understand the [ ] and | | in A and B respectively?

  19. kaylalynn
    • 3 years ago
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    i understand the absolute value signs but i dont know what the bracket things are

  20. nincompoop
    • 3 years ago
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    brackets and curly braces are used when there are nested parentheses to avoid confusion –{2x – [3 – (4 – 3x)] + 6x}

  21. kaylalynn
    • 3 years ago
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    so it would be B because the graph of y = |x| passes the vertical line test??

  22. nincompoop
    • 3 years ago
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    so your A is just simply x = y, which is y = x now if you read the attachment, this could mean f(x) = x

  23. kaylalynn
    • 3 years ago
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    ok so it could mean f(x) = x?

  24. nincompoop
    • 3 years ago
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    yes, it means that the output is the same as the input f(x) the x inside the parenthesis, gives an output of x f(x) = x f(2) = 2 f(blah) = blah

  25. kaylalynn
    • 3 years ago
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    oh ok. that makes sense now!

  26. kaylalynn
    • 3 years ago
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    thanks! i apologize! Im soo tired!

  27. nincompoop
    • 3 years ago
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    will it pass the vertical or horizontal line test?

  28. kaylalynn
    • 3 years ago
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    if x = 2 or 3 or 4 etc. it will pass the vertical line test which means it is a function. But it will not pass the horizontal line test which means it is not a 1 - 1 function.

  29. kaylalynn
    • 3 years ago
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    right?

  30. kaylalynn
    • 3 years ago
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    sorry i meant y

  31. kaylalynn
    • 3 years ago
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    x does not pass the vertical line test so it is not a function

  32. nincompoop
    • 3 years ago
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    input x | output y ------------------ 1 | 1 3 | 3 5 | 5 it is a 1 to 1 no matter what |dw:1365917751738:dw|

  33. Directrix
    • 3 years ago
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    >> which is a function? @kaylalynn A function f is the set of ordered pairs (x,y) such that if (x1, y1) AND (x1,y2) are elements of f, then y1 = y2.

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