Question

(-2,6), (-1,3), (0,2), (1,3), (2,6) is it A. it is a function. B. it is not a functionn

Answer 1

It is B, because you couldn't its just not a function
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Answer 2

Relations and functions are very closely related. While all functions are relations, not all relations are functions. That's because functions are a special subset of relations. For a relation to be a function, there must be one and only one y value for each x value. If there are two pairs of numbers that have the same x  value but different y values, then the relation is NOT a function. 

Now with that being said this is A (it is a function)