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Math Help - multiple chose question

  1. #1
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    multiple chose question

    x 0 2 4 5 6 8 10
    y 0 256 384 400 384 256 0

    Which statement explains what type of function is represented in the table?

    A It is linear because the x values increase by a constant amount?

    B It is quadratic because the function has two x intercepts?

    C It is exponential because the y values do not increase by a constant amount?

    D It's absolute value because the y values increase and then decrease?




    I think it's D am i right?
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by gumi View Post
    x 0 2 4 5 6 8 10
    y 0 256 384 400 384 256 0

    Which statement explains what type of function is represented in the table?

    A It is linear because the x values increase by a constant amount?

    B It is quadratic because the function has two x intercepts?

    C It is exponential because the y values do not increase by a constant amount?

    D It's absolute value because the y values increase and then decrease?


    I think it's D am i right?

    Sorry, it's B
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  3. #3
    MHF Contributor arbolis's Avatar
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    It's b) because looking at the value of y, you see it reaches a maximum when y=400. That is in (5,400). As the function then decreases at the same rate as it increased, it means that the point (5,400) is a vertex of a parabola. Also it intersects the x axis in two points : 0 and 10. It's not d) because it increases and decreases not at a constant rate.
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  4. #4
    A riddle wrapped in an enigma
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    Quote Originally Posted by arbolis View Post
    It's b) because looking at the value of y, you see it reaches a maximum when y=400. That is in (5,400). As the function then decreases at the same rate as it increased, it means that the point (5,400) is a vertex of a parabola. Also it intersects the x axis in two points : 0 and 10. It's not d) because it increases and decreases not at a constant rate.

    Equation: y=-16x^2+160x
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