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anonymous

  • one year ago

Please help The following graph describes function 1, and the equation below it describes function 2: Function 1 graph of function f of x equals negative x squared plus 8 multiplied by x minus 15 Function 2 f(x) = −x2 + 2x − 15 Function ____ has the larger maximum. (Put 1 or 2 in the blank space)

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  1. marigirl
    • one year ago
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    graph of function f of x equals negative x squared plus 8 multiplied by x minus 15 So is it -x^2+8*(x-15)

  2. marigirl
    • one year ago
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    do you agree?

  3. anonymous
    • one year ago
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    yes

  4. marigirl
    • one year ago
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    \[Funtion 1: -x ^{2}+8x-120\] \[Function 2: -x ^{2}+2x-15\] Looking at maximum values ....we could differentiate it and equal it to zero? or we could factorise it. may i know thw topic please?

  5. anonymous
    • one year ago
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    quadric models

  6. anonymous
    • one year ago
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    quadratic sry

  7. marigirl
    • one year ago
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    in that case we can factorise it and see which function has the larger maximum (Or draw the functions)

  8. anonymous
    • one year ago
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    ok

  9. marigirl
    • one year ago
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    or look at y intercepts.. the first function crosses y axis at- 120 where as the second function crosses at y axis -15 .. so the first one is more 'below' than the second.

  10. anonymous
    • one year ago
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    ok

  11. anonymous
    • one year ago
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    I didnt really understand this topic XD im kinda stupid

  12. anonymous
    • one year ago
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    @marigirl

  13. marigirl
    • one year ago
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    from the question what i can sort of gather is that we are looking at the values right.. at which point is their maximum ? if your allowed to use a graphics calculator you can see the following information:

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  14. marigirl
    • one year ago
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    so i guess we can look at the corresponding y-values and see that Function 2 has a higher y value ? I hope i am doing this correct.. is there any way to check it?

  15. anonymous
    • one year ago
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    no but u were really helpful!!!!

  16. marigirl
    • one year ago
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    and if we sketch both in same graph , function will sit above function 1, meaning function 2 has a larger maximum

  17. anonymous
    • one year ago
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    alright thx for all the help!!!!!

  18. marigirl
    • one year ago
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    cool

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