Thank you for the opportunity to help you with your question!

Remember
that with your circle, (x - h)^2 + (y - k)^2 = a^2, where h is the
x-coordinate of the center, k is the y-coordinate of the center, and a
is the radius. When you write the equation, you want to have values for
h, k, and a^2. Keep the x and y as they are.