Videos:
This video provides a nice introduction to the conic sections  (time: 0:51)

Constructing a parabolic reflector using a satellite dish (time: 10:59)
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## Homework Hints 15-4

[tippy title=”Problems 1-8″]Problems 1-8
These problems are basically definitions that you need to know for this section. It would be a good idea not only to look them up to answer these questions, but also to study.[/tippy]

[tippy title=”Problems 9-13″]Problems See the whole entry

## Homework Hints 15-3

[tippy title=”Problems 1-2″]Problems 1-2
There are many problems throughout the text labeled IN YOUR OWN WORDS. Just relax; do not be afraid to give your opinion. For the most part, these questions do not have “right” or “wrong” answers. You … See the whole entry

## 15.4 Outline

1. Introduction
1. definition
2. model
2. Geometric definition of conic sections
1. parabola
1. focus
2. directrix
3. axis
4. vertex
2. ellipse
1. foci
2. major axis
3. center
4. minor axis
3. circle
1. center
4. hyperbola
1. transverse axis
2. center
3. conjugate axis
3. Algebraic definition of conic sections
1. general form
1. first-degree equation
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## 15.3 Outline

1. Curves by plotting points
1. path of a cannonball
2. graph an equation
3. parabola
1. vertex
2. standard parabolas
2. Exponential curves
1. definition
2. general shape

## 15.3 Essential Ideas

This section graphs two important types of curves by plotting points; parabolas and exponentials. … See the whole entry