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douglas12

  • one year ago

Determine whether y varies directly with x. If so, find the constant of variation k and write the equation. x: 7 13 19 25 y: 11.2 20.8 30.4 40 A. yes; k = 1.6; y = 1.6x B. yes; k = 6; y = 6x C. yes; k = 7; y = 7x D. no

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  1. whpalmer4
    • one year ago
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    Divide each value of y by the corresponding value of x. If the answer is the same each time, y varies directly with x and the quotient is the variation constant k.

  2. Awstinf
    • one year ago
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    y varies directly with x

  3. Awstinf
    • one year ago
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    yx=k correct?

  4. vinnv226
    • one year ago
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    No, I believe thats the equation for inversely proportional.

  5. Awstinf
    • one year ago
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    my bad yeah youre right

  6. vinnv226
    • one year ago
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    For directly proportional, y=kx

  7. Awstinf
    • one year ago
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    sorry im trying to lead him to the answer not list it

  8. douglas12
    • one year ago
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    so is the answer A

  9. vinnv226
    • one year ago
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    Yep, the y values are 1.6 times the x values, so the answer is A.

  10. whpalmer4
    • one year ago
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    If the quotient for each y/x =1.6, then it is direct variation with k =1.6

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