Two sets A and B can be joined together with A U B. This would be all the elements in both sets. If A = {a,b,c} and B = {x,y,z} then A U B = {a,b,c,x,y,z}.
Two sets A and B can intersect (the symbol is an upside down U). In the above example, the intersection of A and B is the empty set, because they have no common members. As an example where they do have some common members, let A = {a,b,c,d,e,f} and B = {e,f,g,h}. Then A intersect B = {e,f} because those are the members common to both.
Also, a set can be contained within another set. The containment symbol looks like a C with a line drawn under it. Let A = {a,b,c,d,e,f} and let B = {b,d,f}. Then B is contained within A, i.e., B C A. (Sorry. You'll have to imagine the line under the C.)
Inverse proportion
yes
It is a mapping which assigns one or more outputs to each set of one or more inputs. A relationship need not be a function.
It suggests that there is very little evidence of a linear relationship between the variables.
Relationship can also be represented by a set of ordered pairs called a function.
The relationship between one set of data that decreases as another set of data increases is described as an inverse or negative correlation. In this scenario, when the values of one variable rise, the values of the other variable fall, indicating that they move in opposite directions. This type of relationship can be observed in various contexts, such as the relationship between supply and price or the relationship between demand and price.
editing
There is not set relationship between salary and expences
The set of integers is a proper subset of the set of rational numbers.
The relationship between the writers
There is no set relationship between cc and hp. there are many factors that influence it, such as fuel type, compression ration and ignition temperature.
There is an inverse relationship between the datasets.
Inverse proportion
Equations .
yes
Editing
There may not be any relationship between number of sets and number of elements. You can have just one set or thousands of sets. Similarly, you can also have just one element (rare) or thousands of elements.