by their increase or decrease
A diagram that exhibits a relationship, often functional, between two sets of numbers as a set of points having coordinates determined by the relationship.
The answer depends on what sort of variables the data are (qualitative, quantitative-discrete, quantitative-continuous are; the nature of the relationship (if any) between the data sets; how much information you wish the graph to convey and how much you would prefer to describe in the accompanying text.
The natural numbers (or counting numbers) usually denoted by Z.
A Venn Diagram
A pattern formed by 2 sets of numbers.
10
There are 167 numbers between 10 and 178. There are, therefore 2167 = 1.87*1050 sets.
Venn diagrams are a means for displaying relationships between sets.
There is no correlation.
A mapping is a relationship between two sets.
Correlation.
Regression.