I think it's A
|dw:1434483822391:dw| first calculate the radius using pythagoras
the equation for a circle is (x-a)^2 +(y-b)^2 = r^2 so maybe just working out r^2 from the diagram would help...
in the equation above a and b are the x and y values for the centre so once you have worked out r^2 it will be easy to find the correct equation (it is not A)
I'm confused, would it be B?
I'm not going ot confoirm or deny a series of guesses use my circle diagram above, and use Pythagoras to work out the value of r^2
How do I calculate r^2?
|dw:1434484385823:dw| work out the length of the 2 black lines (the x and y difference in the 2 points) then use Pythagoras to find the length of the hypotenuse
I get (x+4)2+(y+3)2=125
So it would be D, correct?