The standard form of a circle is:
[tex](x-a)^2+(y-b)^2=r^2[/tex]
Your center is [tex](-10, -6)[/tex] and your radius is [tex]9[/tex]
Plug them into the equation and you get
[tex](x-(-10))+(y-(-6)) = 9^2[/tex]
[tex](x+10)^2 + (y+6)^2=81[/tex]
The correct answer is D.
