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vera_ewing

  • one year ago

Math question

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  1. vera_ewing
    • one year ago
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  2. vera_ewing
    • one year ago
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    @ospreytriple

  3. vera_ewing
    • one year ago
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    Pretty sure this one is either a or b

  4. anonymous
    • one year ago
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    Why do you think it's A or B?

  5. vera_ewing
    • one year ago
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    I used desmos to graph the functions, and A and B looked closest. I jus can't tell which one.

  6. anonymous
    • one year ago
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    OK. But we have to actually work things out and not go by the looks of a desmos graph. (the choice of scale can distort things)

  7. vera_ewing
    • one year ago
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    Ok

  8. anonymous
    • one year ago
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    For example, one of the points on the given graph is (-2, 1). See it?

  9. vera_ewing
    • one year ago
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    Yes

  10. anonymous
    • one year ago
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    OK. Try substituting x=-2 into the given functions and see which ones return 1 for f(x).

  11. vera_ewing
    • one year ago
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    C does right?

  12. anonymous
    • one year ago
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    Not quite\[f(x) = |-2-2| = |-4| = 4\]

  13. vera_ewing
    • one year ago
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    Oh wait D does right?

  14. carolinar7
    • one year ago
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    no

  15. carolinar7
    • one year ago
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    oH WAIT I THINK IT IS

  16. anonymous
    • one year ago
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    That's right. Well done. Desmos can be a help, but you mustn't rely on it entirely.

  17. vera_ewing
    • one year ago
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    So the answer is D?

  18. anonymous
    • one year ago
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    Correct.

  19. carolinar7
    • one year ago
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    Yes because the 1/2 does the recipical, so x2 and multiplies the value of x by 2

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