1.
Find the coordinates of the center of a circle with equation
x
2
+
y
2
- 2
x
+ 8
y
+ 13 = 0.
A.
(-1, -4)
B.
(1, -4)
C.
(1, 4)
D.
(-1, 4)
Hint
2.
Find an equation for the graph below.
A.
(
x
+ 4)
2
+ (
y
- 1)
2
= 4
B.
(
x
- 4)
2
+ (
y
+ 1)
2
= 2
C.
(
x
- 4)
2
+ (
y
+ 1)
2
= 4
D.
(
x
+ 4)
2
+ (
y
- 1)
2
= 2
Hint
3.
What is an equation for a circle if the endpoints of a diameter are at (3, 4) and (-3, -2)?
A.
B.
C.
D.
Hint
4.
What is an equation for a circle with a center at (3, -1) that is tangent to the line
x
= 7?
A.
B.
C.
D.
Hint
5.
What is equidistant to all of the points on a circle?
A.
radius
B.
center
C.
tangent line
D.
diameter
Hint