https://docs.google.com/document/d/1CWRnbg0khm17-MvTt7TU-qm-yzEKtAJer9h1H0DSg3k/edit?usp=sharing
https://docs.google.com/document/d/1DrinEPinC2-5OqEwH6CNQHMRzKUyfV1j5MddKdoGB8A/edit?usp=sharing
Geometry Lab: Midpoints, Substitution, and Equations for Roads
Geometry: Unit 8 Lesson 11 Substitution Given Slope