To measure fertility rate of women, the unit children per woman might be used. Part 2 To measure life expectancy, the unit years might be used. Part 3 What correlation, if any, is there between the variables? A. There is a negative correlation because life expectancy tends to increase when fertility in women increases. B. There is a positive correlation because life expectancy tends to increase when fertility in women decreases. C. There is a positive correlation because life expectancy tends to increase when fertility in women increases. D. There is a negative correlation because life expectancy tends to increase when fertility in women decreases. E. The variables are not correlated