Identifying Functions
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A relation is a rule that describes a relationship between two variables. It can be represented in various ways: verbally, as a set of ordered pairs, as an equation, or as a graph on a coordinate plane. A function is a particular kind of relation. This lecture series discusses how to recognize functions when they are given by different representations. Watch the videos and complete the interactive exercises.
What is a function?
Source: Khan Academy, https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions#8th-functions-and-function-notation
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