## zaynahf 2 years ago Direct Variation

1. zaynahf

If y varies directly as x and y=10 when x= 2, find y when x= -6

2. wio

Why are you posting a simple question like this... you know how to do it don't you?

3. zaynahf

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

Direct variation means \[ y = kx \]

5. zaynahf

Yes, i know that. But i need help, step-by-step, on how to actually do the problem.

6. wio

Use the "y=10 when x= 2" info to find k:\ \[ (10) = k(2) \]

7. wio

Once you have k use: \[ y = k(-6) \]To find \(y\)

8. zaynahf

So y is -30?

9. wio

Yeah

10. wio

You aren't playing a game?

11. zaynahf

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

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