Regression.
There is no correlation.
There is an inverse relationship between the datasets.
bar graph
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.
Comparing the relationship of two data sets is needed to see which of the two sets have more life distribution. Two data sets involve the use of simple plotting and contour plots.
It is a positive relationship.
Correlation.
Regression.
There is no correlation.
Correlation
There is an inverse relationship between the datasets.
bar graph
Correlation
a bar graph
A scatter plot
negative correlation