anonymous
  • anonymous
Direct Variation
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
If y varies directly as x and y=10 when x= 2, find y when x= -6
anonymous
  • anonymous
Why are you posting a simple question like this... you know how to do it don't you?
anonymous
  • anonymous
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..?

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anonymous
  • anonymous
Direct variation means \[ y = kx \]
anonymous
  • anonymous
Yes, i know that. But i need help, step-by-step, on how to actually do the problem.
anonymous
  • anonymous
Use the "y=10 when x= 2" info to find k:\ \[ (10) = k(2) \]
anonymous
  • anonymous
Once you have k use: \[ y = k(-6) \]To find \(y\)
anonymous
  • anonymous
So y is -30?
anonymous
  • anonymous
Yeah
anonymous
  • anonymous
You aren't playing a game?
anonymous
  • anonymous
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
anonymous
  • anonymous
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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