Question

The equation of a circle is (x - 4)2 + (y + 1)2 = 9. Which graph best represents the circle?

Answer 1

A circle with its centre at the point (h,k) and with radius r is represented by this equation:
(x - h)² + (y - k)² = r².
So, your circle should have its centre at (4, -1) and its radius is the square root of 9, which is 3.

Answer 2

thanks for the equation, that will help me solve all future problems, i think i had the equation mixed up somewhere before and got an off answer :)