The endpoints of a diameter of a circle are (3, 4) and (7, –2). What is an equation of the circle?

Answer 1

So the midpoint is (5, -1)
and the equation would be

(x-5)^2 + *y+1)^2 = r^2

plug in one of the end points of the diameter to get r^2

check your answer by plugging in the other point, you should get the same r^2 value