The IRS has a wealth of info on their website:
https://www.irs.gov/help/ita/whom-may-i-claim-as-a-dependent
did the student pay for more than 50% of their own support? You may need to drag out the support worksheet and seehttps://apps.irs.gov/app/vita/content/globalmedia/teacher/worksheet_for_determining_support_4012.pdf
