Chapter 10 - Parametric and Polar Curves - 10.4 Conic Sections - 10.4 Exercises - Page 750: 1

$$\eqalign{ & {\text{A parabola is the set of points in a plane that are equidistant }} \cr & {\text{from a fixed point F }}({\text{called the focus}}){\text{ and a fixed line }} \cr & ({\text{called the directrix}}) \cr} $$

$$\eqalign{ & {\text{A parabola is the set of points in a plane that are equidistant }} \cr & {\text{from a fixed point F }}({\text{called the focus}}){\text{ and a fixed line }} \cr & ({\text{called the directrix}}) \cr} $$