Practical Problem: The Height of a Stack of Newspapers
Using the slope-intercept form of equation, a practical problem involving the rate of growth of a stack of newspapers is calculated.
Both Equations in a System Contain the Same Variable
Solving a system of equations using the substitution method when both equations contain the same variable.
Solving Systems with Substitution
An introduction to using the algebraic method of substitution to solve a system of equations in which one of the equations is not in slope-intercept form.
Applying the Slope Formula to a Graph
Using the slope formula to plot a graph.
Practical Problem: Predicting the Earnings for a Business
Using a linear equation to project earnings for a business.
Graphing the Equation F = 1.8C 32
Graphing the equation F = 1.8C 32 to convert temperatures given in Celsius to Fahrenheit.
Check Answers to Both Equations in a System
It's important to check the solution against both equations in a system.
Coordinate Plane
Graphs are created on an imaginary surface called a coordinate plane, which contains vertical and horizontal number lines. Using the numbers on the axes to plot points on the plane creates a picture of the solution.
Example of Using Multiplication to Change Terms
Two different ways of using multiplication in a system of equations to eliminate a variable are demonstrated.
Examples Using Two Points to Write an Equation
Practice writing equations given two points on a line.