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Definitions
Graphs and the Vertical Line Test
Composition and Function
Line of Best Fit and Equation of a Line
Sierpinsky Triangle
  GRAPHS AND THE VERTICAL LINE TEST
Let’s look at the graph of y = |x|.

Is the graph of y = |x| an example of a function?

And the tool to use to find the answer: the vertical line test.

Answer: Yes, the graph of y = |x| is a function.
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