Question

What is the center of the circle given by the equation (x - 3)2 + (y - 9)2 = 16?

A. (3, 9)
B. (-9, -3)
C. (9, 3)
D. (-3, -9)

Answer 1

A

Answer 2

ah no sorry

Answer 3

plug in the x and y values and see which ones give you 16

Answer 4

the general equation of a circle is
\[(x-a)^{2}+(y-b)^{2}= r ^{2}\]


where (a,b) is the centre of the circle and r is the radius

Answer 5

compare that to YOUR equation and hence derive (a,b)

Answer 6

MrNood, can you help me with my question? and the answer is A

Answer 7

since the radius is 4