About This Chapter
How It Works:
- Identify lessons in the Big Ideas Math textbook's Functions chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the function topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, re-watch the videos until you've mastered the material or submit a question for one of our instructors.
Students Will Learn:
- Key terms related to functions
- Mapping diagrams
- Plotting points to graph functions
- Function notation
- Linear and nonlinear functions
- Positive and negative functions
- Increasing and decreasing functions
- Parts of a graph
- Using tables
Big Ideas Math is a registered trademark of Larson Texts, Inc., which is not affiliated with Study.com.
1. What is a Function: Basics and Key Terms
Mapping numbers sounds complex, but we do it when we buy gasoline. We pump gasoline, and the gas station charges us based on the amount of gas that we pump. Learn how this relates to functions while reviewing the basics and notations in this lesson.
2. How to Use and Draw Mapping Diagrams
When you're working with functions, mapping diagrams are a great way to see and track the ways your inputs are related to your outputs. In this lesson, we will learn how to use and draw a mapping diagram.
3. Graph Functions by Plotting Points
Let's say you have a function. What does it look like? How do you graph it? In this lesson, we'll learn how to graph functions by determining and plotting points.
4. Functions: Identification, Notation & Practice Problems
A function is simply a rule that takes one number and turns it into another. But some special conditions must apply for it to be a true mathematical function. Learn about those conditions and how we write functions here!
5. Identify Where a Function is Linear, Increasing or Decreasing, Positive or Negative
Functions do all kinds of fun things. In this lesson, learn how to identify traits of functions such as linear or nonlinear, increasing or decreasing and positive or negative.
6. What Are the Different Parts of a Graph?
Being able to read a graph isn't just vital for an algebra class. Graphs and charts are used everywhere! We'll take a crash course on the basic x/y plane used in algebra and the fundamental vocab you need.
7. Using Tables and Graphs in the Real World
We use tables and graphs in algebra as ways to visually show an equation or function. But do we really use these in the real world? Is it that important to learn about tables and graphs? Find out in this video lesson.
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Other chapters within the Big Ideas Math Common Core 8th Grade: Online Textbook Help course
- Big Ideas Math 8th Grade Chapter 1: Equations
- Big Ideas Math 8th Grade Chapter 2: Transformations
- Big Ideas Math 8th Grade Chapter 3: Angles & Triangles
- Big Ideas Math 8th Grade Chapter 4: Graphing & Writing Linear Equations
- Big Ideas Math 8th Grade Chapter 5: Systems of Linear Equations
- Big Ideas Math 8th Grade Chapter 7: Real Numbers & the Pythagorean Theorem
- Big Ideas Math 8th Grade Chapter 8: Volume & Similar Solids
- Big Ideas Math 8th Grade Chapter 9: Data Analysis & Displays
- Big Ideas Math 8th Grade Chapter 10: Exponents & Scientific Notation