Day 10 HW

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There's a method called "The Vertical Line Test" for determining from the graph of a relation whether it is a function or not. For example, look at the two graphs below.

The first graph passes the vertical line test, so therefore it's a function.

The second graph, however, fails the vertical line test, so it is not a function.

Study the two graphs and see if you can figure out why this test works, then answer the question below.

Graph #1 - Passes the Vertical Line Test, so is a function.

Graph #2 - Fails the Vertical Line Test, so is not a function.

Write a few sentences (in your own words) explaining why you think the vertical line test works for determining a function.

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