In this lesson, you learned how 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 helped you reach those goals:

• 4.12.1: Determining Reasonable Inputs and Outputs
  • In this activity, you worked to decide if inputs and outputs were reasonable in functions given the context of a situation.
• 4.12.2: Domain: The Input of a Function
  • In this activity, you determined which inputs are possible and which are impossible through a card sort activity. You noticed the reasonableness of an input depends on the situation’s context.
  • 4.12.2: Self Check
  • 4.12.2: Additional Resources
• 4.12.3: Range: The Output of a Function
  • In this activity, you identified possible outputs of a function to make the range. You also identified input-output pairs from graphs.
  • 4.12.3: Self Check
  • 4.12.3: Additional Resources
• 4.12.4: Using Graphs to Determine the Domain of a Function
  • In this activity, you explored what happens when an input gives an undefined output.
• 4.12.5: Using Functions to Answer-Real World Questions
  • In this activity, you answered real-world questions by describing the elements of the domain and range of a given situation.

After these activities, you completed the following practice:

• 4.12.6: Practice