We're almost done with this first round of graphing now! We just have to learn about the relationships between parallel and perpendicular lines in terms of slope and other characteristics, so that we can more easily graph them, and write the equations for such lines using some nifty tricks. Opposite reciprocals, yo! Watch the whole Mathematics playlist: Classical Physics Tutorials: Modern Physics Tutorials: General Chemistry Tutorials: Organic Chemistry Tutorials: Biochemistry Tutorials: Biology Tutorials: EMAIL► ProfessorDaveExplains@ PATREON► Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience! Amazon: Bookshop: Barnes and Noble: Book Depository: