Question

Circle S has an equation of (x + 16)2 + (y – 9)2 = 4. What is the center and radius of circle S?
Answer
Center: (16, -9); Radius: 4
Center: (-16, 9); Radius: 4
Center: (16, -9); Radius: 2
Center: (-16, 9); Radius: 2

Answer 1

Radius=2

Answer 2

center-radius form for the equation of a circle...
(x-h)^2 + (y - k)^2 = r^2
where (h, k) is your center and r is your radius.

Answer 3

http://screensnapr.com/v/enJ47B.png

Answer 4

Thank you both :)