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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
  DEFINITIONS
The answer in this case is, “Yes”.

Set “A” is a function because for each x-coordinate there is exactly one y-coordinate.

Note: If all the x-coordinates of a domain in the relation are different, the relation must be a function. Be careful when the x-coordinates are the same!
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