Question

I need answer please​

Answer 1

It is centered at (h,k) --> (0,0) and has a radius 9

The equation of the circle is

`(x-h)^(2) +(y-k)^(2) =r^(2) \\(x-0)^(2) +(y-0)^(2) =r^(2)\\x^(2) +y^(2) = 9^(2)`

Hope that helps!