Question

What is the equation of the graph below?

http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-A09/b/assessments/C-CirclesExam/Geometry_7_Exam_81q.gif

Answer 1

the equation of any circle is :
\[(x-a)^2 + (y-b)^2 = r^2 \]
; a is the x coordinate of the center of the circle
b a is the y coordinate of the center of the circle
r is the radius of the circle.

so the equation is
\[(x-(-2))^2 + (y-(-4))^2 = 2^2\]
\[(x+2)^2 + (y+4)^2 = 4\]

Answer 2

Ah, I see what I was doing wrong there. Thanks!