1. Equation of a circle?

2 (x-1)squared+2 (y+2)squared=7
I got center=1,-2 and r=1.9. Does that look correct?

2. Re: Equation of a circle?

Your radius appears to be rounded to one decimal place...it is actually:

$\displaystyle r=\sqrt{\frac{7}{2}}$

3. Re: Equation of a circle?

Originally Posted by Nfalconer
2 (x-1)squared+2 (y+2)squared=7
I got center=1,-2 and r=1.9. Does that look correct?
Originally Posted by MarkFL
Your radius appears to be rounded to one decimal place...it is actually:

$\displaystyle r=\sqrt{\frac{7}{2}}$
To add a bit: If you can give an exact answer, such as MarkFL's, it is best to do so.

-Dan

4. Re: Equation of a circle?

When graphing the circle do i graph it 1.9 away from center or 1.3?

5. Re: Equation of a circle?

The circle will be the set of all points that are a distance $\displaystyle r$ from the center. So, approximately 1.9 units from the center.