Question

State the center point and radius of the circle. Write the equation of the circle in standard form.

Answer 1

Below

Explanation:

Standard form of a circle = (x-h)^2 + (y-k)^2 = r^2

where h,k is the center

for this circle h,k = 2,-1 and radius, r= 4

so the equation would be

(x-2)^2 + (y+1)^2 = 4^2