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Is the relationship between the variables in the table a direct variation, an inverse variation, both, or neither? if it is a direct or inverse variation, write a function to model it.

x 2 5 15 20
y 20 15 2 2

a. inverse variation;y=10/x
b. neither
c. direct variation; y=x+10
d. direct variation; y=10x

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5 answers

  1. If xy is constant, it's inverse
    If x/y is constant, it's direct

    Looks like (b) to me

    (c) is a bogus answer in any case.

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  2. Thanks for the great explanation steve

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  3. it is B. neither

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  4. i think its neither

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  5. Is the relationship between the variables in the table a direct variation, an inverse variation, both, or neither? if it is a direct or inverse variation, write a function to model it.

    x 2 5 12 20
    y 30 12 5 3

    a. inverse variation;y=60/x
    b. neither
    c. direct variation; y=2x+2
    d. direct variation; y=15x

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