Question

What is the equation of a circle with the center -7, 9 with the radius 2​

Answer 1

C

Explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

here (h, k) = (- 7, - 9) and r = 2, hence

(x - (- 7))² + (y - (- 9))² = 2², thus

(x + 7)² + (y + 9)² = 4 → C

Answer 2

centre =(-7,-9)=(h,k)

radius=2

then

the equation of the circle is

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

(x+7)^2+(y+9)^2=2^2

answer is option C.