Web Reference: Learning Objectives In this section, you will: Determine whether a relation represents a function. Find the value of a function. Determine whether a function is one-to-one. Use the vertical line test to identify functions. Graph the functions listed in the library of functions. 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. Rather than write “height is a function of age”, we could use the descriptive variable h to represent height and we could use the descriptive variable a to represent age.
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