Final answer:
The information in this chart is best used to compare the obesity rates of different demographic groups over a 14-year period.
Step-by-step explanation:
The information in this chart would best be used in a presentation to compare the obesity rates of different demographic groups over a 14-year period. The chart displays the obesity rates for white/non-hispanic boys, african-american/non-hispanic boys, and mexican-american boys in 1994 and 2008. By comparing the rates from these different groups, we can gain insight into any disparities or changes in obesity prevalence over time.