Khan Academy: Impact of Transforming (Scaling and Shifting) Random Variables

A video [4:31] explaining how to find the mean or expected value of a discrete random variable.

Finding the mean (or expected value) of a discrete random variable.

A practice word problem asking students to calculate the mean of B in a probability chart.

Video discussing transformation matrices and how a vector is able to be mapped to the same resulting vector by using a transformation matrix with respect to the standard basis as well as one with respect to a different basis. Reviews how...

Given a description of a sequence of transformations, determine whether it preserves segment length or angle measure. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

Given a description of a sequence of transformations, determine whether it preserves segment length or angle measure.

The second video on Benford's Law from the Khan Academy. This video connects Benford's Law to the logarithmic scale in an effort to explain why it holds true, particularly in data that grows exponentially. [6:27]

This video demonstrates how to write a two variable inequality given the graph of the inequality on a coordinate plane. Practice problems available. [3:20]

Using a TI-84 (very similar for TI-85 or TI-89) calculator for making calculations regarding geometric random variables.

Given two polygons, try to map one onto the other using angle-preserving transformations, and determine whether they are similar. Transformations are done in "intuitive mode." Students receive immediate feedback and have the opportunity...