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anonymous

  • one year ago

The graph of which function has an axis of symmetry at x =-1/4 ? f(x) = 2x2 + x – 1 f(x) = 2x2 – x + 1 f(x) = x2 + 2x – 1 f(x) = x2 – 2x + 1

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  1. Nnesha
    • one year ago
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    \[\huge\rm x=\frac{ -b }{ 2a }\] to find c-coordinate of vertex(axis of symmetry)

  2. Nnesha
    • one year ago
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    b and a values are \[\rm Ax^2+Bx+C\] where a=leading coefficient b=middle term c=constant term

  3. anonymous
    • one year ago
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    will give medals

  4. anonymous
    • one year ago
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    i have answer chioces listed

  5. anonymous
    • one year ago
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    @Nnesha

  6. Nnesha
    • one year ago
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    i know so which is your answer A , B ,C or D >

  7. anonymous
    • one year ago
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    im thinkin c

  8. anonymous
    • one year ago
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    @Nnesha

  9. Nnesha
    • one year ago
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    no.

  10. anonymous
    • one year ago
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    im horrible at math lol but my next guess is d

  11. Nnesha
    • one year ago
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    don't guess next time when you say is it B or A or D i'll ask to explain it for me

  12. Nnesha
    • one year ago
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    start with 1st option okay what is a and b value in that equation

  13. anonymous
    • one year ago
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    2

  14. Nnesha
    • one year ago
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    a=2 right b=1 x is same as 1x not substitute a and b for their value into that formula

  15. anonymous
    • one year ago
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    -1/2*2?

  16. Nnesha
    • one year ago
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    yes right multiply 2 times 2 ?

  17. anonymous
    • one year ago
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    -1/4

  18. anonymous
    • one year ago
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    so a is the answer

  19. Nnesha
    • one year ago
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    i think so :=)

  20. anonymous
    • one year ago
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    thank you!!!

  21. Nnesha
    • one year ago
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    you're lucky don't have to check other 3 options ...

  22. Nnesha
    • one year ago
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    np

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