Question

Write the equation of the circle with center (2, -3) and a radius of 4.

A) (x + 2)^2 + (y - 3)^2 = 4
B) (x - 2)^2 + (y + 3)^2 = 4
C) (x + 2)^2 + (y - 3)^2 = 16
D) (x - 2)^2 + (y + 3)^2 = 16

Answer 1

(D) is the answer i just took the quiz on usatestprep

Explanation:

Answer 2

C(h,k) radius(r)
C(2,-3) r=4

(x-h)^2 + (y-k)^2 = r^2
(x-2)^2 + (y--3)^2 = 4^2
(x-2)^2 + (y+3)^2 = 16

therefore, the answer is D