Pre-Calc

Video Lessons

I've added a few links to videos that might help you through specific topics in each of the chapters. They are all from Khan Academy. This site is a great resource for you if you get stuck in any of your classes!

Chapter 1 Linear Relations and Functions

Evaluating composite functions

Graphing a linear equation: y=2x+7

Graphing a linear equation: 5x+2y=20

Writing linear equations in all forms

Parallel lines from equation

Perpendicular lines from equation

Introduction to piecewise functions

Intro to graphing two-variable inequalities

Chapter 2 - Systems of Linear Equations and Inequalities

Systems of equations with graphing: exact & approximate solutions

Systems of equations with elimination: x-4y=-18 & -x+3y=11

Systems of equations with substitution: -3x-4y=-2 & y=2x-5

Intro to linear systems with 3 variables

Solving linear systems with 3 variables

Multiplying matrices

Determinant of a 2x2 matrix

Determinant of a 3x3 matrix: standard method (1 of 2)

Determinant of a 3x3 matrix: shortcut method (2 of 2)

Intro to matrix inverses

Solving linear systems with matrix equations

Solving linear systems with matrices

Intro to graphing systems of inequalities

Chapter 3 - The Nature of Graphs

Intro to function symmetry

Shifting & reflecting functions

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