And in there, I'm now going to put all the countries of the world, each one represented by a dot, and on top of that I'm going to put the regression line that shows the average relationship.
在这个区域中我要把世界上 所有的国家放在里面， 每个国家用一个点来代替， 在这些点上面我会绘制一条回归曲线， 来表现两个变量间的平均关系水平。