1: The domain solely consists of whole numbers due to the fact that the child is only receiving the 25 cents at the end of each day. Therefore, no partial value is in the area of this function.
2: This outputs to this function are multiples of 0.25 beginning with 2.00. For instance, 2.00, 2.25, 2.50, 2.75, etc. Thus, an output of value 3.10 will in no way be accomplished through any enter in the domain.
Hope this helps, I've never been too good at this subject.
