Question

Which of the following is the equation for a circle with a center of (−2, −3) and a radius of 7? (2 points)

1. (x + 2)2 + (y + 3)2 = 49
2. (x − 2)2 + (y + 3)2 = 7
3. (x + 2)2 + (y + 3)2 = 7
4. (x − 2)2 + (y − 3)2 = 49

Answer 1

1. (x + 2)^2 + (y + 3)^2 = 49

Explanation:

Circle equation: (x-h)^2 + (y-k)^2 = r^2

(h,k) = (-2,-3)

r = 7

(x+2)^2 + (y+3)^2 = 7^2

(x+2)^2 + (y+3)^2 = 49

Answer 2

1

Explanation:

(x-h)^2+(y-h)^2=r^2

radius = 7 = 49

h,k = -2,-3

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