Answer:
D . . . (it represents a quadratic function)
Explanation:
The x-values are 1 unit apart for all values in all tables, making the problem much simpler. All you need to do is find the table where the y-value differences are not the same from one line to the next.
In table A, y-values decrease by 3.
In table B, y-values increase by 5.
In table C, y-values increase by 1.
In table D, y-values increase by 3, 2, 1—numbers that are not constant. (These differences decrease by 1, a number that *is* constant. Since the 2nd differences are constant, the table represents a 2nd degree function.)