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anonymous

  • 5 years ago

is this a function?

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  1. anonymous
    • 5 years ago
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    no

  2. anonymous
    • 5 years ago
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    haha sorry i still need to attach the file!

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  3. anonymous
    • 5 years ago
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    A function need to pass a verticle line test

  4. anonymous
    • 5 years ago
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    i know but i cant tell if this one does.. i graph it on my calculator but its not working

  5. anonymous
    • 5 years ago
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    You calculator will only graph the top half

  6. anonymous
    • 5 years ago
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    Plot a second function with - infront of it

  7. anonymous
    • 5 years ago
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    http://www.wolframalpha.com/input/?i=Plot%5B {Sqrt%5B%28x%2B2%29%2F2%5D%2C-Sqrt%5B%28x%2B2%29%2F2%5D}%5D

  8. anonymous
    • 5 years ago
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    I posted the link to my plot, can you see it?

  9. anonymous
    • 5 years ago
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    is \[\sqrt{x}-1 \] a function

  10. anonymous
    • 5 years ago
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    Yes

  11. anonymous
    • 5 years ago
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    http://www.wolframalpha.com/input/?i=Plot%5B {Sqrt%5B%28x%2B2%29%2F2%5D%2C-Sqrt%5B%28x%2B2%29%2F2%5D}%5D

  12. anonymous
    • 5 years ago
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    ok. the link is only partly blue so i dont think its working

  13. anonymous
    • 5 years ago
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    Just copy/paste the whole thing to your address bar

  14. anonymous
    • 5 years ago
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    okay now i see it!! but i still cant tell if it is a function. is it?

  15. anonymous
    • 5 years ago
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    It is not since it does not pass the verticle line test. Blue(top) and purple plot(bottom)

  16. anonymous
    • 5 years ago
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    My two cent. If a teacher gives you a function, as a equation than it is probably a function. If the teacher graphs it for you than it is probably NOT a function, but in both cases you need to verify it with the vertical line test. It is extremely hard to make an equation that is not a function.

  17. anonymous
    • 5 years ago
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    y = +- sqrt x is not a function

  18. anonymous
    • 5 years ago
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    its +- sqrt x -1 though

  19. anonymous
    • 5 years ago
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    well its the same idea

  20. anonymous
    • 5 years ago
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    so for sure it is not a function? also, what is the domain of 3x^2+4x+2? os ot a;; real numbers

  21. anonymous
    • 5 years ago
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    is it all real numbers**

  22. anonymous
    • 5 years ago
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    all real numbers, because there is no reason to restrict the domain

  23. anonymous
    • 5 years ago
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    for example y = 1/x , we cant have division by zero when x = 0, so x=0 is not in the domain. but the rest of real numbers is

  24. anonymous
    • 5 years ago
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    okay, so is \[\sqrt{x}-1 \] a function or not??? i need a final answer!!!!!!

  25. anonymous
    • 5 years ago
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    its a function, but when you have +- , it isn't a function

  26. anonymous
    • 5 years ago
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    is 5/9 (F-32) a function

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