Information for pair0075: UNdata from http://data.un.org Gross national income (GNI) and life expectancy. One can see the GNI per capita as an index how rich a country is. The wealth of a country influences the qualtity of the health care system and thus indirectly the mortality rate of its children. x: under 5 mortality rate for different countries (deaths per 1000 live births) y: GNI (Gross national income) per capita for different countries (in US$) ground truth: y --> x