Answer:
centre = (0, - 5)
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
x² + (y + 5)² = 16 is in this form
with (h, k) = (0, - 5) ← centre
