Khan Academy: Constructing Curves Using Repeated Linear Interpolation

Using all his tools - tablet, Excel, graphing calculator, and mathematical prowess - Sal orchestrates an algebraic symphony in this video. He works through a word problem involving linear interpolation, and emphasizes the importance of...

Video demonstrates through several examples how to solve inequalities using multiplication and division of positive and negative numbers. Practice problems available. This video is also found in the strand Algebra: ck12.org. [10:27]

Video shows how to solve and graph inequalities using subtraction or addition. Practice problems available. This video is also found in the strand Algebra: ck12.org. [7:48]

Match parabolic curves using a 3-point polygon in this seven-problem quiz/practice on parabolic curve matching.

Given a description of a real-world relationship, determine whether that relationship is linear or exponential. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

This video demonstrates how to create a direct variation model, or a linear equation, given a word problem that deals with rate of change. It also shows how to solve the equation and graph the direct variation model. Practice problems...

In this video lesson [4:29] watch Sal work through a harder Solving systems of linear equations problem.

Video shows an example of solving a second order linear homogeneous differential equation. Includes how to write the solution in a general form using the properties of homogeneous equations shown in the previous video. Briefly discusses...

The final video in a series of lessons on solving non-linear systems of equations. A quadratic system is given and, in the process of solving algebraically, it is determined that there is no solution. This conclusion is confirmed...

Video shows using the foundation shown in previous videos how to more quickly find a solution to a second order linear homogeneous differential equation. Includes using initial conditions with the general solution to find a particular...