
You get this by switching the f(x) and the x and then solving for the new f(x)
D -9 because it has a -3 and its going to be the same - sign
<span>Given the two end of the diameter of the circle, we are able to compute the center of the circle as 0.5*[(-1,3)+(7,-7)]=(3,-2). The radius of the circle is 0.5*sqrt[(-1-7)^2+(3+7)^2]=sqrt(41). Therefore the equation of the circle is (x-3)^2+(y+2)^2=41.</span>
First set up the equation:

Then substitute in known values:

and solve for C
