Practical Problem: The Length of the Spring on a Scale
Using the elimination method to solve a practical problem involving a scale, a spring, and some weights.
Introduction to Variables: x 0 = 0
Letters are used in algebraic equations to represent numbers we do not know the value of yet. These are called variables.
Standard Form of a Linear Equation
The standard form for a linear equation is detailed.
Practical Problem: Find Travel Speed
In a practical illustration, travel speed is calculated using two ordered pairs.
Practical Problem: Furniture Salesperson Earnings
Using the slope-intercept form to solve a practical problem involving calculating earnings.
Introduction to Linear Equations with Two Variables
Linear equations with two variables have an infinite number of solutions.
Graphing Points on the Coordinate Plane
How to graph points on the coordinate plane.
Graphic Solution for Equation with Two Variables
Graphs, tables, and equations are three ways to describe a relationship between two variables.
Slope-intercept Form
Review of the slope-intercept form showing how to write an equation given the slope and the y-intercept, and how to write an equation to solve for the y-intercept given the slope and one point.
Slope is the Same Everywhere on a Straight Line
The ratio of a sloped line remains the same anywhere on that line and is unaffected by positive or negative position.