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mamma17

  • 3 years ago

1. Suppose that x and y vary inversely, and x = 7 when y = 11. Write the function that models the inverse variation. a.) y=1.57x b.) y=77/x c.) y=4/x d.) y=18/x

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  1. KingGeorge
    • 3 years ago
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    Since they are inversely proportional, you know that\[y=\frac{k}{x}\]for some real number k. You also know that when x=7, y=11. So you have \[11=\frac{k}{7}.\]So you just need to solve for \(k\). That make sense?

  2. mamma17
    • 3 years ago
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    so then I would times 7 on each side to get the answer?

  3. KingGeorge
    • 3 years ago
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    Exactly.

  4. mamma17
    • 3 years ago
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    ty lol so then the answer would be y=77/x?

  5. KingGeorge
    • 3 years ago
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    Looks right to me.

  6. mamma17
    • 3 years ago
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    ty ty ty

  7. KingGeorge
    • 3 years ago
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    You're welcome.

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