# Thread: Help with finding an equation of a graph..

1. ## Help with finding an equation of a graph..

A curve is traced by a point P(x,y) which moves such that its distance from the point A(-1,1) is three times its distance from the point B(2,-1). Determine the equation of the curve.

2. This is the distance from P to A: $D(P,A) = \sqrt {\left( {x + 1} \right)^2 + \left( {y - 1} \right)^2 }$.
Now you want to write the equation resulting from $D(P,A) = 3D(P,B).$