1.
Find an equation of the circle whose center is at (-2, 4) and has radius 5.
A.
(
x
- 2)
2
+ (
y
+ 4)
2
= 5
B.
(
x
- 2)
2
+ (
y
+ 4)
2
= 25
C.
(
x
+ 2)
2
+ (
y
- 4)
2
= 25
D.
(
x
+ 2)
2
+ (
y
- 4)
2
= 5
Hint
2.
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
3.
Find the radius of a circle with the equation
x
2
+
y
2
+ 6
x
- 10
y
+ 28 = 0.
A.
6
B.
5
C.
D.
3
Hint
4.
Find an equation for the graph below.
A.
(
x
- 4)
2
+ (
y
+ 1)
2
= 4
B.
(
x
+ 4)
2
+ (
y
- 1)
2
= 4
C.
(
x
+ 4)
2
+ (
y
- 1)
2
= 2
D.
(
x
- 4)
2
+ (
y
+ 1)
2
= 2
Hint
5.
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