Now, if we were trying to show a trend, we'd want the plots of each consecutive data set to line up so that, for the most part, the minimum value of one plot is close to the maximum value of the plot before it. If we were trying to show that as your state's Brady Grade rose, your state's violent crime and homicide rates dropped, we want to see each consecutive plot to be slightly above the plot before it, graphing from higher grades to lower, so that it could be shown there was a definite relationship between gun control and crime rate, or, more specifically, more gun control = less crime. This can not be shown with this data, but then, neither can the opposite. There is simply too much overlapping in data to show a trend one way or another.