Skip to ContentGo to accessibility pageKeyboard shortcuts menu
OpenStax Logo
Algebra 1

4.12.7 Lesson Summary

Algebra 14.12.7 Lesson Summary

Search for key terms or text.

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

Checking In

On a scale of 1 to 5, how confident do you feel about the learning goals of this lesson?

Citation/Attribution

This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's permission.

Want to cite, share, or modify this book? This book uses the Creative Commons Attribution-NonCommercial-ShareAlike License and you must attribute OpenStax.

Attribution information
  • If you are redistributing all or part of this book in a print format, then you must include on every physical page the following attribution:

    Access for free at https://openstax.org/books/algebra-1/pages/about-this-course

  • If you are redistributing all or part of this book in a digital format, then you must include on every digital page view the following attribution:

    Access for free at https://openstax.org/books/algebra-1/pages/about-this-course

Citation information

© May 21, 2025 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike License . The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.