aidenguzman701701 aidenguzman701701
  • 13-09-2021
  • Mathematics
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1.2.3 domain and range practice help me find out why it is a function

123 domain and range practice help me find out why it is a function class=

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AlgebraicAardvark
AlgebraicAardvark AlgebraicAardvark
  • 13-09-2021

It's a function because there's only one y-value for any x-value used by the graph.  That's the definition of a function: exactly one y-value (output) for each x-value (input).

Pick and x-value and ask, "What's the y-value for this x-value on the graph?"  You only get one answer.

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