Machine Learning: Linear Regression

Here is the introduction to Linear Regression... this ended up being a lot longer than we intended but it is a comprehensive introduction to the math and implementation of a fundamental algorithm, including multi-variate/multi-variable regression, optimization, gradient descent, and the overall machine learning pipeline. Most videos will try to avoid the theory bloat and will aim for the sweet spot of about 10-20 minutes but there are exceptions like this one (which you can always watch on double-speed! :).
ERRATA:
On the "Simple Example" slide, the points should be: $(1,2), (2,4), (3,6)$