There is a significant difference between low-income achievement versus high-income achievement in education. Those who have a higher income have a higher chance of performing better in their SAT exams. Wealthy people have more access to better resources therefore low-income families have limited educational opportunities. SAT scores and income combined ultimately affect the likelihood that the student will graduate. 

 

 

Source: http://www.nytimes.com/2014/05/18/magazine/who-gets-to-graduate.html