Introduction
If someone offered you a pair of shoes, would you take it? How about a free meal or a free trip to the movies? In this lesson, you will learn how to use linear equations to analyze prices so that you can save money to buy the things you want.
Activity
Let's look at how we can save money on our cell phone bill. Visit Systems of Linear Equations: Real World Systems and Solutions to compare cell phone plans and determine which plan is a better value.
Following successful completion of this lesson, students will be able to...
- Graph linear equations using a table of values.
- Determine if ordered pair is a solution to a linear equation.
Essential Questions
- What does the equation of a line tell you about graph of the line?
- What does the slope and y-intercept of a line tell you about a line?
- How are horizontal lines and vertical lines different?
- What are some real-world relationships that can be modeled by graphs?
Enduring Understandings
- Linear relationships can be defined on the coordinate plane.
- The slope of a linear equation represents a constant rate of change.
- The characteristics of linear equations and their graphs are useful in solving real-world problems.
The above objectives correspond with the Alabama Course of Study: Algebra I standards: 14, 30, and 30a.