ACCESS - Parabolas
A is the focus point of this parabola. B is a point on the parabola. y=0 is the directrix. BC is the distance between any point on the parabola and the directrix.
1. Drag point A, the focus point. How are AB (distance between a point on the parabola and focus point) and BC related?
2. Now drag point B. How are AB and BC related?