Decide whether or not the equation has a circle as its graph. If it does, give the center and the radius. If it does not, describe the graph. x2 +y- - 6x + 2y = -9 Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. The graph of the equation is a line. O B. The graph of the equation is a point. O C. The graph of the equation is a circle with center (Type an ordered pair.) The radius of the circle is O D. The graph is nonexistent