Respuesta :

sqdancefan
The center (h, k) is (3, -1), and the radius r is 3. When you put those values into the formula
  (x -h)² + (y -k)² = r²
you get
  (x -3)² + (y +1)² = 9

This formula matches that of ...
  C) (x-3)² +(y+1)² = 9
The equation of the given circle is:

radius is 3
center is (3 , -1)

equation: (x - 3)² + (y + 1)² = 3²

Answer = (x - 3)² + (y + 1)² = 9

Hope this helps :)