What defines a function?

A function assigns each input x exactly one output y. The vertical line test checks if a graph is a function: if a vertical line crosses more than once, it is not a function.

What is the domain of a function?

The domain is the set of all possible input values x for the function.

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College Algebra: Functions and Graphs

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Finding the Domain of an Equation

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Relations & Functions Example 1

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Relations and Functions

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What defines a function?: A function assigns each input x exactly one output y. The vertical line test checks if a graph is a function: if a vertical line crosses more than once, it is not a function.
What is the domain of a function?: The domain is the set of all possible input values x for the function.

College Algebra: Functions and Graphs

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