Question 883596
Hints:


1) Find the center of the circle. This is the <a href="http://www.purplemath.com/modules/midpoint.htm">midpoint</a> of the line segment that has the endpoints (3, -2) and (9, -8). 


2) Find the <a href="http://www.mathwarehouse.com/algebra/distance_formula/index.php">distance</a> between the two points. This distance is the diameter. Cut the diameter in half to get the radius.


3) The general equation of any circle is {{{(x-h)^2+(y-k)^2 = r^2}}} where (h,k) is the center and {{{r}}} is the radius.