Answer:
Integer number
Step-by-step explanation:
A "whole dollar" amount means, there's no decimal point, or cents in the dollar amount.
This represents a whole number, which is an integer.
It is an integer because we are told that the while dollar amount could be negative, positive or zero.
A number that is zero, positive or negative, which is also not a fraction nor a decimal, meets the true definition of what can be referred to as an integer.
Thus, the whole dollar amount change could be 0, -4, 4.
