The second table you described represents an exponential function. It has a common ratio of 4, meaning that each y-value is multiplied by 4 to get to the next value. (every time the Xs increase by 1, the Ys increase by a multiple of 4)
The commutatice property for addition says a+b=b+a If it was for subtraction, then it would be a-b=b-a Take a=7 and b=5 7-5 is not equal to 5-7 2 is not equal to -2 So subtraction is not commutative for whole numbers.
