Question

Use the information provided to write the standard form equation of each circle.

2) Center: (-7,8)
Radius: 7
A) (x – 8)2 + (y – 7)? =4
B) (x + 7) + (y - 8)² = 49
C) (x + 7)+(y – 8)2 = 2401
D) (x – 7)2 + (y – 8) = 49

Answer 1

(x-(-7))+(y-8)=7^2

B

Explanation:

Answer 2

(x + 7)² + (y - 8)² = 49

Explanation:

Circle Equation: (x - h)² + (y - k)² = r²

(h, k) is center

r is radius

Step 1: Define

h = -7

k = 8

r = 7

Step 2: Substitute

(x - -7)² + (y - 8)² = 7²

(x + 7)² + (y - 8)² = 49