# Ch 1: Understanding Functions: CCSS.Math.Content.8.F.A.1

Use our video lessons to accompany your students' introduction to mathematical functions. Take advantage of the quizzes that accompany each lesson to track your students' learning.

Standard: Understand that a function is a rule that assigns to each input exactly one output. The graph of a function is the set of ordered pairs consisting of an input and the corresponding output.

Students who have mastered this standard are able to plot points on Cartesian planes. They are also proficient in plotting equations by connecting those points in graphs.

Lessons in this standard include concepts such as:

• Understanding variable, domain and range in relation to functions
• Tips for using vertical line testing
• Strategies for finding ordered pairs
• Tips for plotting points and graphing

Students demonstrate mastery of this standard when making visual representations of points on planes. They find ordered pairs, plot points and connect dots to graph functions. Mastery of this standard supports their college and career readiness because working efficiently with functions helps to build a strong basis for upper level math, such as calculus, and working with mathematics helps students exercise their higher level thinking skills.

### How to Use These Lessons in Your Classroom

Here are some tips for how to use these lessons to support instruction in the CCSS.Math.Content.8.F.A.1 standard:

#### Every Day Math Lesson

After viewing the video pertaining to the basics and key terms of functions, review the example connecting functions to buying gas. Challenge students to brainstorm other examples of how they use functions in their daily lives. As a class, expand some of those examples, citing the variables, domain and range involved in each.

#### Social Studies Math Connection Lesson

Watch all of these functions video lessons with your students. Then guide them in plotting points on maps, stressing the similarities between that activity and the process of plotting points on Cartesian planes.

#### Practice Math Lessons

Share the video lesson pertaining to graphing functions by plotting points. Review the lesson's practice problems. Assign additional practice exercises, checking for understanding and determining whether re-teaching is required.

4 Lessons in Chapter 1: Understanding Functions: CCSS.Math.Content.8.F.A.1
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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