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# What Is a Function in Math?

In mathematics, a function is a relation between a set of inputs and a set of permissible outputs. Specifically, each input into a function has exactly one corresponding and correct output.

Continue ReadingOne example of a function is the relation between x (any real number) and twice that number, or 2x. The function would then be written with the notations f(x) (read "f of x" or "function of x") and 2x (the function itself). It would be written as f(x)=2x. For the input 3, the output would be 6, which is 2 times 3. For the input -3, the output would be -6, and so forth.

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Q:
## What Does "linear" Mean in Math?

A: When applied in mathematics, the term "linear" refers to any equation that, or any function whose equation is, a straight line. When placed on a graph, the... Full Answer >Filed Under: -
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## What Does Domain Mean in Math?

A: Domain, in math, is defined as the set of all possible values that can be used as input values in a function. A simple mathematical function has a domain o... Full Answer >Filed Under: -
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## What Is Discrete Math?

A: Discrete mathematics is a branch of mathematics dealing with structures that are basically discrete rather than continuous. Discrete items are those that a... Full Answer >Filed Under: -
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## What Is "term" in Math?

A: A term in mathematics is defined as a number, variable or number-variable combination in an algebraic expression or equation. Terms are separated from each... Full Answer >Filed Under: