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1-47.

Which of the relationships below are functions? If a relationship is not a function, give a reason to support your conclusion.

  1. Ask your teacher for a model of this graph.

There is more than one output value for some inputs; therefore, the relation is not a function.

  1. input

    output

It is a function. Every input had only one output even if it is the same output such as .

  1. input

    output 

There is more than one output value for . Is this relation a function?

  1. Ask your teacher for a model of this graph.

It is a function.