Now in Algebra, we use a lot of variables, which we can write as letters. Our algebra mission in this series is to know these unknowns! In algebra, we don't dilly-dally or mess about; we find things out. Topics include: Cost Functions, Input and Output, Trend Lines, Graphs, and Domain and Range.

Originally released by Cerebellum Corporation, 2010. Streaming video file encoded with permission for digital streaming by Infobase on July 10, 2018.

Introduction: Functions and Cost Function (7:35); --Input and Output (2:01); -- Scatterplots and Trend Lines (1:51); -- Data, Equations and Graphs (8:41); -- Domain and Range (1:41); -- Credits: Functions (0:17); .