(x - 7)^2 + (y + 3)^2 = 3
(x - 7)^2 + (y + 3)^2 = 81
(x + 7)^2 + (y - 3)^2 = 3
(x + 7)^2 + (y - 3)^2 = 81
(x - 7)^2 + (y + 3)^2 = 81
(x + 7)^2 + (y - 3)^2 = 3
(x + 7)^2 + (y - 3)^2 = 81
-
The equation for a circle centered at (h, k) and with radius r is given by:
(x - h)² + (y - k)² = r²
So, if a circle is centered at (7, -3) and has radius 9, the only answer that fits is the second one.
(x - 7)² + (y + 3)² = 81
(x - h)² + (y - k)² = r²
So, if a circle is centered at (7, -3) and has radius 9, the only answer that fits is the second one.
(x - 7)² + (y + 3)² = 81
-
where a is the x coordinate of the center, b is the y coordinate of the center and r is the radius. The equation of a circle is (x-a)^2 + (y-b)^2 = r^2
Therefore the equation of this circle is;
(x-7)^2 + (y+3)^2 = 81
Therefore the equation of this circle is;
(x-7)^2 + (y+3)^2 = 81
-
The basic form of equation for a circle is (x-h)^2 + (y-k)^2 = r^2 where (h,k) is the location of the center and r is the radius so the second one is correct.
-
The first one is the correct answer
-
second one