Write the standard equation of a circle with the center at (6,8) that passes through the point (-1,4)
Well, you know the equation must be
(x-6)^2 + (y-8)^2 = r^2
plug in your point (-1,4) to find r^2
all done
(x-6)^2 + (y-8)^2 = r^2
plug in your point (-1,4) to find r^2
all done