It depends. Based on the information you gave, it's possible that the student gave half of her support with a $6,000 income, but not likely. However, that is a determination the taxpayer needs to make.
Here are some additional considerations to your list of expenses:
1. Food alone according to the USDA's thrifty food plan for a female 19 year old is $2,988 a year
2. Automobile expenses including cost of vehicle, repairs, insurance, registration
3. FMV of rent would likely be more than computed, since utilities aren't included.
4. Did the student earn scholarships? Scholarships are considered support not paid by student.
