In this lesson, you will learn to identify the inputs and outputs as the domain and range of a function. You will calculate real-world examples using money, area, and perimeter to understand how the use of the domain and range of a function can be applied in everyday life.

When you finish this lesson, you will be able to:

• Describe the “domain” and “range” of a function.
• Determine a reasonable domain and range for the function when given a description of a function in a situation.

Here are the activities that will help you reach those goals:

• 4.12.1: Determining Reasonable Inputs and Outputs
• 4.12.2: Domain: The Input of a Function
  • 4.12.2: Self Check
  • 4.12.2: Additional Resources
• 4.12.3: Range: The Output of a Function
  • 4.12.3: Self Check
  • 4.12.3: Additional Resources
• 4.12.4: Using Graphs to Determine the Domain of a Function
• 4.12.5: Using Functions to Answer Real-World Questions

After that, you’ll practice and review.

• 4.12.6: Practice
• 4.12.7: Lesson Summary