caclulus question thank you

The Greek method for finding the equation of the tangent line to a circle uses the fact that at any point on the circle the lines containing the center and the tangent line are perpendicular. Use this method to find an equation of the tangent line to the circle x2 + y? = 49 at the point (6,V13 ) The equation of the tangent line to the circle x2 + y= 49 at the point (6, V13 ) is]. (Type your answer in slope-intercept form. Rationalize all denominators.)