CCG 12.1.3: 12-38 Student eTool (Desmos)

FOCUS AND DIRECTRIX OF A PARABOLA

How does the distance between the focus (the point) and thedirectrix (the line) affect the shape of the parabola?

The RED Point F is the focus of the parabola. Move it up and down to see how the distance between the focus and directrix affects the shape of the parabola.