Web Reference: Therefore, function notation is a way in which a function can be represented using symbols and signs. Function notation is a simpler method of describing a function without a lengthy written explanation. The most frequently used function notation is f (x) which is read as “f” of “x”. Jul 23, 2025 · Function notation is a precise and simplified way to express the relationship between inputs and outputs. Instead of using the typical y = format, function notation replaces y with a function name, such as f (x), where f represents the function's name, and x is the input variable. Function notation expresses a function by assigning it a name, typically f, g, or h, followed by its input variable enclosed in parentheses. The expression f(x) is read as "f of x" and represents the output value of the function f when the input is x.
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