Uploaded June 2025 | Updated September 2026, 2 weeks ago

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Can your personal habits really predict how well you’ll do on a test? In this video, we use linear algebra to analyze survey responses and midterm scores from real students. Along the way we learn about Matrix Algebra and one of the most useful equations in linear algebra, the Normal Equation.

Math The World is dedicated to bringing real world math problems into the classroom and answering the age old question “when will I ever use this?”

We use unique topics for algebra, trigonometry, calculus, and much more and go beyond context problems and use a technique called mathematical modeling to find solutions to real world questions and real world problems. These videos are great for students who plan to enter technical fields that require real world problem solving, and can be a great resource for teachers looking for ways to bring real world contexts into their classroom.

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Created by Doug Corey

Script: Doug Corey and Jennifer Canizales
Audio: Doug Corey
Animation: Jennifer Canizales
Music: Coma Media \ Restum Anoush from Pixabay

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