Question

Find the equation of the circle with center at (-1, 3) and radius of 4.

Answer 1

(x+1 )^2+(y−3)^2= 16

Explanation:

We can write the equation of a circle as

(x−h)^2+(y−k)^2=r^2

Where (h,k) is the center and r is the radius

(x− -1 )^2+(y−3)^2= 4^2

(x+1 )^2+(y−3)^2= 4^2

(x+1 )^2+(y−3)^2= 16