1. A point P(x,y) moves so that its distance, d1, from the point (0,2) is always one-third its distance, d2, from the line y = 10. We will show its path is that of an ellipse with eccentricity 1 (where the eccentricity of an ellipse is defined to be the ratio: distance between the foci ). distance between the vertices 3 a) Use the distance formula to compute d1 and d2. Do not simplify (leave as square roots).