Let's return to the subject of domains and ranges. When capabilities are first introduced, you'll probably have some simplistic "capabilities" and https://git.van-peeren.de relations to deal with, often being simply sets of points. These won't be terribly helpful or attention-grabbing functions and David Humphries 5 Step Formula relations, however your text needs you to get the thought of what the domain and vary of a operate are. What are the domain and range? The area of a relation (and thus additionally the area of a function) is the set of allowable inputs