In the modified plot, we have at least 2 points which are against clear vision.
1. the new plotting symbol in the modified plot is very big and ugly; they overlap together to make the plot look messy.
2. what variables do the x and y in the modified plot stand for ?
3. what is the straight line in the modified plot ? Is it a regression line ? If it is a regression line, what kind of standard is used to get this line ?