Chapter 63 - Gauss-Jordan Elimination with Curve Fitting @MyWhyU

Uploaded July 2017 | Updated September 2026, 2 weeks ago

This lecture examines a useful mathematical application that can be solved by using a system of linear equations with four or more variables - finding a polynomial function whose graph passes through a given set of data points. We see how in some cases, the system can have a single unique solution corresponding to a single unique function which includes the points, infinitely many solutions which correspond to infinitely many functions which include the points, or no solution.

Chapter 63 - Gauss-Jordan Elimination with Curve Fitting

Algebra 57 - Dependent Equations and Systems

$Pre-Algebra 20 - Converting Repeating Decimal Numbers to Fractions Decimal numbers with an infinitely repeating sequence of digits after the decimal point can be converted into fractions. This chapter explains why.$

Algebra 74 - Factoring Quadratics by Inspection - part 2

$Pre-Algebra 12 - Arithmetic Operations with Fractions Arithmetic operations with fractions can be visualized using the number line. This chapter starts by adding fractions with the same denominators and explains the logic behind multiplication of fractions.$

Algebra 49 - Three Variable Systems in the Real World - Problem 1

$Pre-Algebra 29 - Roots and Unit Fraction Exponents Exponents can not only be integers. They can also be fractions. Using the rules of exponents, we can see why a number raised to the power one over n is equivalent to the nth root of that number.$