Quiz about Graphing Circles

Question 1

What does (h,k) stand for in the standard circle equation?

Accepted Answer

(h,k) is the center of the circle

Answer

(h,k) is a point on the circle.

Answer

(h,k) is a point that we guess and find

Answer

(h,k) is the distance of the circle

Question 2

In the equation (x-3)²+(y+4)²=121, the radius of the circle is

Accepted Answer

11

Answer

242

Answer

121

Answer

22

Question 3

What is the equation of a circle with radius 2 and center (3, 4)?

Accepted Answer

(x-3)² + (y-4)² = 4

Answer

(x+3)² + (y+4)² = 2

Answer

(x-3)² + (y-4)² = 2

Answer

(x+3)² + (y+4)² = 4

Question 4

What is the equation of the circle?

Accepted Answer

(x+1)² + (y +1)² = 9

Answer

(x+1)² + (y +1)² = 3

Answer

(x+1)² + (y -1)² = 3

Answer

(x-1)² + (y -1)² = 9

Question 5

What are the coordinates of the center and the radius of the circle with equation:
(x - 4)² + (y - 3)² = 25 ?

Accepted Answer

Center (4,3)
Radius = 5 units

Answer

Center (4,3)
Radius = 25 units

Answer

Center (-4,-3)
Radius = 25 units

Answer

Center (-4,-3)
Radius = 5 units

Question 6

In the equation (x-3)²+(y-2)²=16, the center of the circle is...

Accepted Answer

(3,2)

Answer

(-3, -2)

Answer

(-2, -3)

Answer

(2, 3)

Question 7

What is the equation of the circle.

Accepted Answer

(x - 3)²+ (y + 4)² = 9

Answer

(x - 3)²+ (y + 4)² = 3

Answer

x²+ y² = 9

Answer

(x - 1)²+ (y + 1)² = 7

Question 8

See Picture

Accepted Answer

A

Answer

B

Answer

C

Question 9

What is the center of the circle with equation x² + y² = 1?

Accepted Answer

(0, 0)

Answer

(1, 1)

Answer

(0,1)

Answer

not enough information

Question 10

Center is at (-3, 1) and radius is 3.

Accepted Answer

(x + 3)² + (y - 1)² = 9

Answer

(x - 3)² + (y + 1)² = 9

Answer

(x - 3)² + (y + 1)² = 3

Answer

(x + 3)² + (y - 1)² = 3

Question 11

What is the center and radius of this circle?
(x + 3)² + (y + 7)² = 4

Accepted Answer

Center: (-3, -7)
radius = 2

Answer

Center: (3, 7)
radius = 4

Answer

Center: (-3, -7)
radius = 4

Answer

Center: (-3, 7)
radius = 2

Question 12

The diameter of a circle has length 12. The center is at (-5, 2). Give the equation of the circle.

Accepted Answer

(x + 5)²+ (y - 2)²= 36

Answer

(x + 5)²+ (y - 2)²= 144

Answer

(x - 5)² + (y + 2)² = 36

Answer

(x - 5)² + (y + 2)² = 12

Question 13

Which graph corresponds to

x²+ (y-6)²=9

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Graphing Circles

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