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### Relations and Functions

Each relation or function has a domain and a range.

Functions may be one to one, and may be discrete or continuous.

Functions satisfy the vertical line test: any vertical line crosses the graph at most once.

One variable, usually x, is the independent variable. The other variable is the dependent variable.

### Relations and Functions

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

- Intro 0:00
- Coordinate Plane 0:38
- Example: Origin and Quadrants
- Relations 4:08
- Example: Ordered Pairs
- Domain and Range
- Functions 5:57
- Example: Mapping
- One-to-One Functions 9:58
- Example
- Graphs of Relations 13:42
- Example: Discrete and Continuous
- Vertical Line Test 16:26
- Examples
- Equations, Relations, Functions 19:38
- Example: Independent and Dependent Variables
- Function Notation 21:51
- Examples
- Lecture Example 1 24:39
- Lecture Example 2 28:29
- Additional Example 3
- Additional Example 4

1 answer

Last reply by: Lydia Radden

Sat Sep 11, 2010 8:02 PM

Post by pauline jordan on October 2, 2009

-2-2=4 or -4 @ why?