After going back to reclassify the breaks the higher the classes the better the chloropleth map it will be, but higher classes will not be as productive with graduated symbols, dot density or proportional symbols. After playing with the the classes and setting ranges manually the best way to portray the classes and breaks is 5 classes through a manual classification to represent percent change. As for the graduated symbols, proportional and dot density maps true values were used therefore 5 classes were still used, but with a different set of ranges.
The colors for the maps were chosen based off what was being presented and the ability to comprehend.
Colors Ramp Selection
Graduated Symbols - A yellow hue was selected for the counties in North and South Dakota with red graduated sphere symbols. The red stands out and triggers the eye to examine the symbol. While examining the symbol the map viewer can see the changes the map is presenting.
Dot Density - A dark blue was selected as the background in order to use yellow for the dots representing a value per dot. Yellow was chosen because having the dots around one another or far away presented in yellow mimics the view of lights seen from space down on Earth. The dots are better understood when seen as groups of yellow dots on a dark background and visualized as population density much like populated areas with lights on Earth.