Points, Lines, Planes, and Space

Create a linear equation for a problem when the intercept information is not given. The two-day lesson introduces the class to the point-slope form, which can be used for problems when the initial conditions are not provided. Pupils...

Keep the planes from crashing. Pupils work with three airplanes and change their flight paths to keep them at a safe distance from each other. Individuals work through three problems in the third interactive in a set of six with...

Sal's goal in this video is to "familiarize ourselves with the x, y-coordinate plane." If your pupils have blank expressions when you present them with graphing problems, this video will be a great help to clear up the basics.

Provide the definitions of parallel and perpendicular lines, as well as the relationships between their slopes. Two examples explain the process of finding the equation of either a perpendicular or parallel line to another line through a...

Here is fairly basic video that takes three equations, each written in slope-intercept form, with the goal of determining whether the lines are parallel.  Sal graphs each of the equations on the same coordinate plane to show how their...

A point is an exact location in space. This tutorial defines the concept of a point as it occurs in graphing, geometry, and algebra. A variety of examples are used to show how important points are and where they'll be seen in the world...

Graph a horizontal line that goes through a given point by first plotting that point on a coordinate plane. Then draw a straight line left and right that goes through the point, and you're done!

Did you know that a fly started the idea of the coordinate plane? A video introduces the Cartesian Coordinate Plane and the vocabulary associated with it. The resource provides the procedure in which to plot a point along with...

Draw a graph, label the units, plot the given point, then draw a straight line up and down through the given point. That is now the graph of a vertical line through a given point.

Trying to write the equation for a horizontal line given an ordered pair? Just keep in mind that a horizontal line is all about the y value in the ordered pair. Plain and simple! Whatever the y value is in the ordered pair becomes the...