Function or Not???

What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• Every output has ONE input

• It is a function because a vertical line would only touch once

• It's not a function because a vertical line would only touch once

• It's not a function because a vertical line would touch more than once.

• It is a function because a vertical line would touch more than once.

• It is a function because a vertical line would only touch once.

• It's not a function because a vertical line would only touch once.

• It's not a function because a vertical line would touch more than once.

• It is a function because a vertical line would touch more than once.

• It is a function because a vertical line would only touch once.

• It's not a function because a vertical line would only touch once.

• It's not a function because a vertical line would touch more than once.

• It is a function because a vertical line would touch more than once.

• It is a function because a vertical line would only touch once.

• It's not a function because a vertical line would only touch once.

• It's not a function because a vertical line would touch more than once.

• It is a function because a vertical line would touch more than once.

• It is a function because a vertical line would only touch once.

• It's not a function because a vertical line would only touch once.

• It's not a function because a vertical line would touch more than once.

• It is a function because a vertical line would touch more than once.

• It is a function because a vertical line would only touch once.

• It's not a function because a vertical line would only touch once.

• It's not a function because a vertical line would touch more than once.

• It is a function because a vertical line would touch more than once.

• It is a function because each input has one output

• It's not a function because an input has more than one output

• It's not a function because an output has more than one input.

• It is a function because each output has one input.

• It is a function because each input has only one output.

• It's not a function because an input has more than one output.

• It's not a function because an output has more than one input.

• It is a function because each output has one input

• It is a function because each input has only one output.

• It's not a function because an input has more than one output

• It's not a function because an output has more than one input

• It is a function because each output has one input.