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douglas12

  • 2 years ago

y varies directly as to x. when x = -1.5 y = 9. Find y when x = 6

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  1. jdoe0001
    • 2 years ago
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    http://openstudy.com/study#/updates/51eae087e4b0d999840f0ed6

  2. jdoe0001
    • 2 years ago
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    direct variaion y = \(\bf k\)x what's "k"? well, when x = -3/2, y = 9, thus 9 = \(\bf k\)(-3/2) solve for "k" to see what "k" is

  3. douglas12
    • 2 years ago
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    k is -3/2

  4. jdoe0001
    • 2 years ago
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    hmmm, let's see 9 = k(-3/2) what would that give you cross multiplying?

  5. douglas12
    • 2 years ago
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    -1.5

  6. jdoe0001
    • 2 years ago
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    \(\bf 9 =k \times -\cfrac{3}{2} \implies 9 = \cfrac{3k}{-2}\) try cross multiplying :)

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