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What is the purpose of the vertical line test for functions?

What is the purpose of the vertical line test for functions?-example-1
User LazyProphet
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Answer:

The purpose of the vertical line test is to determine if the function is in fact a function. (Option C)

Step-by-step explanation:

Once a vertical line is drawn to every part of the function and it only hit one point on the graph, then it is a function. For example,

If the vertical line hits two points or more on the graph, then the graph is not a function. For example, a circle is not a function.

What is the purpose of the vertical line test for functions?-example-1
What is the purpose of the vertical line test for functions?-example-2
User Mkrinblk
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