Each line represents a county. They are colored by percentage of people that had fever or malaria in 2006.
To filter data, click and drag along an axis. To reorder the dimensions, drag the axes titles around.
Next step, explore the data! For example, you can drag the Poverty Rate axis next to the Fever or Malaria axis and then filter on the Fever or Malaria axis to check for correlations. While you filter and move the filter along the axis, you can also observe the selected counties on the map.