Identify the center

(x + 9) ^2 + y^2 = 64

Your Center is : (-9,0).

This is the form of a circle. Use this form to determine the center and radius of the circle.

(

x

-

h

)

2

+

(

y

-

k

)

2

=

r

2

(

x

-

h

)

2

+

(

y

-

k

)

2

=

r

2

Match the values in this circle to those of the standard form. The variable

r

r

represents the radius of the circle,

h

h

represents the x-offset from the origin, and

k

k

represents the y-offset from origin.

r

=

8

r

=

8

h

=

9

h

=

9

k

=

0

k

=

0

The center of the circle is found at

(

h

,

k

)

(

h

,

k

)

.

Center:

(

9

,

0

)

(

9

,

0

)

These values represent the important values for graphing and analyzing a circle.

Center:

(

9

,

0

)

(

9

,

0

)

Radius: 8