Sagot :
Answer:
Relations are sets of ordered pairs. Usually, the first coordinates come from a set called the domain and are thought of as inputs. The second coordinates are thought of as outputs and come from a set called the range (I actually prefer to call this the co-domain but that’s a long story we don’t need to go into here).
Answer:
The term one-to-one relationships refers to relationships of two items in which one can only belong with the other. These relationships can be referred to in a mathematical sense, in which there are equal numbers of items, or when creating a database when one row directly corresponds to another row. Discover more about one-to-one relationships that you might see in your everyday life.
Step-by-step explanation:
hope it helps :)