I belive his answer is wrong B/c the graph does not even start near 310 the first to bars make it to 50 and 150 so even if u add the two together it would only be 200 so, the answer would be B
The standard form of the equation of a circle is
.
Solution:
Center of the circle = (6, 4)
Radius of the circle = 
<u>To find the equation of the circle:</u>
General formula for the equation of a circle

where (h, k) is the center of the circle and r is the radius of the circle.
Here, h = 6, k = 4 and r = 


Hence the standard form of the equation of a circle is
.