Planet Nutshell Math Shorts provide animated videos that explain various math topics. On this site, students learn about proportional relationships.

In this lesson, you will learn how to find unit rates by reading graphs. [5:02]

Aplication problem related to stringed instruments by first finding the constant of proportionality and then using it to find another value.

[Free Registration/Login may be required to access all resource tools.] Learn how to recognize and write equations of direct variation and try practice exercises. [11:11]