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. We use the Vertical Line Test to determine whether or not an expression is a function. If any vertical line intersects the graph exactly once, the expression is a function. Dec 26, 2024 · To visualize this concept, let’s look again at the two simple functions sketched in Figures 3 1 1 a and 3 1 1 b. The function in part (a) shows a relationship that is not a one-to-one function because inputs q and r both give output n.
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