## anonymous 4 years ago Determine whether the equation defines y as a function of x. If it does, state y as a function of x x^2 + 9y^2 =1 y=?

1. IsTim

Are you to rearrange the equation so that "y" is by itself?

2. anonymous

i think so

3. IsTim

If so, subtract x^2 from both sides. Then divide both sides by 9. Afterwards, find the square root. Simple algebra.

4. anonymous

not simple, which is why i need help.

5. anonymous

$y=(+/-)\sqrt{x^2-9}$

6. anonymous

/9 i mean

7. anonymous

nevermind.

8. IsTim

Looks about it. Is everything on the right side divided by 9? Or just whats in the square root?

9. anonymous

$y=(+/-)\sqrt{(1-x^2)/9}$

10. IsTim

Ok. Looks good.

11. IsTim

I'm still iffy on whether or not this is what's required for this question.

12. anonymous

y as a function of x: y(x) =

13. IsTim

Ok. If that's what you want. Good job.