relationless - or you just would not say anything about the non-relation. If you don't have a car are you carless? If you don't have a swimming pool are you poolless?
a bar graph
It is a positive relationship.
There is an inverse relationship between the datasets.
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.
Correlation.
Regression.
There is no correlation.
bar graph
to show the relationship between 2 sets of data
Correlation
negative correlation
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.