# What is the equation for function notation?

Space and AstronomyAn equation involving x and y, which is also a function, can be written in the form y = “some expression involving x”; that is, **y = f ( x)**. This last expression is read as “ y equals f of x” and means that y is a function of x.

## How do you write an equation in function notation?

Video quote: *For function notation we can say the function of X is equal to 2x plus 4 and this is a fancy way of saying that whenever we substitute in for X whichever.*

## What is notation equation?

Notation is **a symbolic system for the representation of mathematical items and concepts**. The concept of notation is designed so that specific symbols represent specific things and communication is effective. Index notation in mathematics is used to denote figures that multiply themselves a number of times.

## Why do we use function notation?

Function notation can be used **to generate points on a graph or find the value of the function for a specific value of x**. It is a convenient, shorthand way to study what a function’s values are for different values of the independent variable x.

## How do you find function notation from a table?

Video quote: *The question find X means you need to look up here and say oh. This is x equals 0 it's the input that would give me the output 2. So simply x equals 0 is the answer to this question.*

## What is function notation example?

Function Notation. **When a function is expressed as an equation, it is often written as “f(x).”** In creating a table of values for an equation, for example y = 5x – 1, we use this rule, “multiply by five and subtract one” to transform an input x value into the one resulting y value.

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