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douglas12 Group Title

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

  • one year ago
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  1. whpalmer4 Group Title
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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.

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

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

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

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

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

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

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

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

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

    • one year ago
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