More Lessons for Grade 9
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
Learn how do we write functions as rule
You can use the Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem. Then click "Answer" to check your answer.
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