A consortium of 50 clothing producers sells its stock through one or more exclusive merchants (i.e. each merchant is associated with one and only one producer). We draw a sample of 12 producers for which we observe two variables X and Y where X represents the number of merchant (s) associated with a producer and Y represents the sales (in tens of thousands of dollars) during the last month. Here is the sample data.

\fProducteur i X Y 1 2.4 2 1 1,5 4.0 11 1,1 2 2,4 2 1,6 2 3,3 1,7 3,5 10 4,1 11 6,1 12 9,1