Using the Vertical Line Test

The video tutorial explains how to use the vertical line test to determine if a graph represents a function. It involves analyzing graphs by passing a pencil vertically across them to see if it intersects more than one point at a time. If it does, the graph is not a function. The tutorial also covers how to identify non-function relationships in a table by ensuring that each input has a unique output. The lesson concludes with a review of the key concepts, emphasizing that vertical lines are not functions and that each input in a function must have a single output.

How can you determine if a graph is a function using the vertical line test?

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What is the vertical line test used for?

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What does it mean if a graph fails the vertical line test?

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Can a vertical line be considered a function? Explain your answer.

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What conclusion can you draw about functions based on the vertical line test?

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What is one value of X that could replace the missing value in the table to show that Y is not a function of X?

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Explain why the relationship between X and Y values is not a function when there are multiple outputs for the same input.

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