Find an Equation for the Set of Points in an Xy-Plane

question 50

Multiple Choice

Find an equation for the set of points in an xy-plane such that the difference of the distances from F and F ' is k.

---

Definitions:

Lens

A piece of transparent material with at least one curved surface, which refracts or focuses light rays.

Iris

The colored part of the eye surrounding the pupil that controls the amount of light entering the eye.

Pupil

The circular opening in the center of the eye that allows light to enter and reach the retina, adjusting in size to regulate the amount of light.

Cornea

The clear, protective outer layer of the eye that helps to focus incoming light.