Identify the center and radius of the circle below.
$$( x + 1 ) ^ { 2 } + ( y - 8 ) ^ { 2 } = 9$$
A) Center: $( - 1,8 )$
Radius: 3
B) Center: $( - 1,8 )$
Radius: 9
C) Center: $( 1 , - 8 )$
Radius: 3
D) Center: $( 1 , - 8 )$
Radius: 9
E) Center: $( 8 , - 1 )$
Radius: 3

Question

Quizplus · Accepted Answer

The center of the circle is given as ( -1, 8 ) and the radius is given as 3. This is in standard form where (h, k) is the center of the circle and r is the radius. Therefore, the correct choice is A.

Identify the Center and Radius of the Circle Below (x+1)2+(y−8)2=9( x + 1 ) ^ { 2 } + ( y - 8 ) ^ { 2 } = 9(x+1)2+(y−8)2=9

Identify the Center and Radius of the Circle Below $( x + 1 ) ^ { 2 } + ( y - 8 ) ^ { 2 } = 9$