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zaynahf

  • 2 years ago

Direct Variation

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  1. zaynahf
    • 2 years ago
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    If y varies directly as x and y=10 when x= 2, find y when x= -6

  2. wio
    • 2 years ago
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    Why are you posting a simple question like this... you know how to do it don't you?

  3. zaynahf
    • 2 years ago
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    Im posting it because i forgot how to do it, and i have finals.. why would i post it if i know how to do it..?

  4. wio
    • 2 years ago
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    Direct variation means \[ y = kx \]

  5. zaynahf
    • 2 years ago
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    Yes, i know that. But i need help, step-by-step, on how to actually do the problem.

  6. wio
    • 2 years ago
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    Use the "y=10 when x= 2" info to find k:\ \[ (10) = k(2) \]

  7. wio
    • 2 years ago
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    Once you have k use: \[ y = k(-6) \]To find \(y\)

  8. zaynahf
    • 2 years ago
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    So y is -30?

  9. wio
    • 2 years ago
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    Yeah

  10. wio
    • 2 years ago
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    You aren't playing a game?

  11. zaynahf
    • 2 years ago
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    Nope dude, im 100% serious. I forgot how to do that.. and now that i know, its coming back. Sincere question o_o Thanks though

  12. BrittanyFrench
    • 2 years ago
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    Some people actually forget how to do things so they need help without others bringing them down.. and once you help like they said it's coming back. GOod job though

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