Answer:
y is not a function of x.
Explanation:
To know if this is a function, first look in the x column.
If there are no repeated numbers, its a function. Here there is a repeat. 1 is listed twice.
Since there are two different y's that go with the x, when x is 1, this is not a function.
Because (1,8) and (1,12) are the problem. This is not a function because even just one x has more than one y.