Equation of Circles Challenges

Write the equation of a circle with center (7, 0) with radius 3.

• (x - 7)² + y² = 9

• x² + (y -7)² = 9

• (x - 7)² + y² = 3

• x² + (y -7)² = 3

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

• Center (4,3)

  Radius = 5 units

• Center (4,3)

  Radius = 25 units

• Center (-4,-3)

  Radius = 25 units

• Center (-4,-3)

  Radius = 5 units

What is the equation of the circle?

• (x+1)² + (y +1)² = 3

• (x+1)² + (y -1)² = 3

• (x+1)² + (y +1)² = 9

• (x-1)² + (y -1)² = 9

What is the center of the circle with this equation is (x+2)²+(y-4)²=41?

• (-2,41)

• (-2,4)

• (2,-4)

• (2,41)

Which graph corresponds to

x² + (y - 6)² = 9

• A

• B

• C

• D

Which graph corresponds to 
(x-4)²+ (y+4)²=25

• A

• B

• C

• D

The equation of a circle is derived from

• gradient-intercept forumla

• point-slop form

• distance formula

• quadratic equation

Select the matching graph.

• 
• 
• 
• 

Which graph corresponds to (x - 8)²+ (y + 2)² = 4

• A

• B

• C

• D

Which graph corresponds to 
(x)²+ (y-6)²=9

• A

• B

• C

• D