Identify the center and radius of the circle (x+4)^2+(y-3)^2 = 16.

a. center: (4,-2), r=4
b. center: (-4,2), r=4
c. center: (4, -2), r=16

Question

Identify the center and radius of the circle (x+4)^2+(y-3)^2 = 16.

a. center: (4,-2), r=4
b. center: (-4,2), r=4
c. center: (4, -2), r=16

campbell_st · Answer

the standard form of a circle is

$$(x -h)^2 + (y - k)^2 = r^2$$

where 

(h, k) is the centre and r is the radius

compare this to your equation and you'll get the centre and radius..

campbell_st · Answer

and it appears there may be a typo between your equation and answer choices... 

equation has y - 3   and anwers have 2

jdoe0001 · Answer

http://www.mathwarehouse.com/geometry/circle/images/equation-of-circle/general-formula-equation-of-circle.png