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Relations and Functions Examples

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More Lessons for Grade 9, Math Worksheets

Videos, worksheets, solutions, and activities to help Algebra 1 students learn how to distinguish between relations and functions and how to to solve real life problems that deal with relations.

What is a relation?
A relation is any set of ordered pairs.

What is a function?
1. A function is a relation in which each x-element has only one y-element associated with it. Given a set of ordered pairs, a relation is a function if there are no repeated x-value.
2. A relation is a function if there are no vertical lines that intersect its graph at more than one point. This is called the vertical line test.

Relations & Functions
This video looks at relations and functions. It includes six examples of determining whether a relation is a function, using the vertical line test and by looking for repeated x values.
Learn about relations

Relations - Applications
Learn to solve real life problems that deal with relations
Learn about functions

Write Functions
Learn how do we write functions as rule

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You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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