Explanation:
A relation is an equation where y can be described in terms of x.
A function is a relation where every x is related to only one y. It means that for the same x we can't get 2 or more possible values of y.
Therefore, y = -3.1x^2 + 4x - 11 is both a relation and a function. Because for every x we have one possible outcome for y.
Answer: A. It represents both a relation and a function.
