Real Engineering
What's the Biggest Machine in the World?
Which is the biggest machine of them all? A Real Engineering video claims that the biggest machine in the world is the US electrical grid and its components. It describes the first electrical plant made by Edison as well as various other...
Virtual Nerd
Virtual Nerd: How Do You Identify Points on a Graph?
Learn how to plot a point on a coordinate plane, identify the ordered pair, and figure out which quadrant the point is in. This video shows examples along with hints and tricks. [7:17]
Sophia Learning
Sophia: Using a Third Axis
This lesson demonstrates the use of a third axis when representing data.