Question

John and David graphed a circle with center (-3,1)

Answer 1

Neither of them are fully correct because the equation of a circle is:

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

h = x value of center coordinate

k = y value of center coordinate

r = radius

Therefore, the correct equation of the circle is:

$(x + 3) ^{2} + (y - 1) ^{2} = 49$

David had the correct values in each of the parentheses while John had the correct value on the right side of the equation.