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2-9.

Which of the relations below are functions? Justify your answer. Homework Help ✎

  1. Do all of these graphs have one output value for every input value?

  2. For each graph above, state the domain and range.

  • The domain of a graph is its possible x-values.

  • All real numbers.

  • The range of a graph is its possible y-values.

  • 1 ≤ y ≤ 3