Data from the U.S. Census Bureau and the Behavioral Risk Factor Surveillance System shows that Smoking is positively correlated with both Poverty and Obesity. In both cases, when the median percent of the population who smokes increased from 9.7% (Utah) to 26.7% (West Virginia), Poverty increased from 11.7% to 18.3% and Obesity increased from 25.7% to 35.7%.
This relationship does not appear to hold true for Age vs. these factors, where the correlation with Poverty and Obesity is much less direct.