Question

The table below shows a relationship between the variables x and y. Explain

whether or not this table represents a function.

Answer 1

There is a rule:

one input(x-value) can only have one output(y-value) in order to be a function.

So if one input has more than one output, it is not a function.

But if an output has more than one input, it is still a function.

This table does not represent a function because the inputs: 0, 1, 2,

have more than one output.