04:21duration 4 minutes 21 seconds

Vertical Line Test

This demonstrates why and how to use vertical lines to test whether a graph of any relation is a function or not.

03:45duration 3 minutes 45 seconds

Identifying functions from relations

Discussion of what relations and functions are and then some exapmles of how to indentify if a particular relation is more specifically a function.

02:13duration 2 minutes 13 seconds

Graphing a linear inequality on the number line

A demonstration of number line graphs. There are two examples in the vi deo, but when you do the questions in ALEKS you'll only have to do one.