Although the domain and codomain of functions can consist of any type of objects, the most common functions encountered in Algebra are real-valued functions of a real variable, whose domain and codomain are the set of real numbers, R.

### General Information

**Subject(s):**Mathematics

**Grade Level(s):**9, 10, 11, 12

**Suggested Technology:**Computer for Presenter, Computers for Students, Internet Connection, Interactive Whiteboard

**Instructional Time:**9 Minute(s)

**Keywords:**Domain;, Range;, Dependent variable;, Independent variable;, Function;, Real variable;

**Instructional Component Type(s):**

**Video/Audio/Animation**

**Resource Collection:**Secondary Math specific existing tutorials