Master how to determine if a graph is a function or not

The video tutorial explains how to determine if a graph represents a function using the vertical line test. A function is defined as a set of inputs uniquely mapped to outputs. The vertical line test is a method to check if a graph is a function by ensuring a vertical line crosses the graph at most once. Examples are provided to illustrate when a graph is a function and when it is not. The tutorial concludes with a summary of the method.

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