Suppose a ball is being twirled at the end of a string and thecenter of rotation

Suppose a ball is being twirled at the end of a string and thecenter of rotation is the origin of a coordinate system. If thestring breaks the initial path of the ball is on a line that isperpendicular to the radius of the circle. Suppose the stringbreaks when the ball is at the point whose coordinates are P(1 2).Find the equation of the line on which the initial path lies.