Web Reference: Nov 18, 2025 · A standard function notation is one representation that facilitates working with functions. Typically, the letters f, g and h are often used to represent functions just as we use x, y and z to represent numbers and A, B and C to represent sets. Functions from a Graphical Perspective. A function is a set of ordered pairs with the property that no two points in the set share the same first coordinate. Function notation gives a name to a function, and makes clear which variable is independent (that is, which is the variable for which you'll be picking input values). The name for the formula, such as A (for, say, the area of a square), is followed by a parenthetical, such as (s) (for the length of a side of the square), and is set equal to the for...
YouTube Excerpt: Learn how to evaluate functions in this video tutorial by Mario's Math Tutoring. We discuss
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