Natalie was given a 30 question test. For each correct question she answered, she earned 2 points. For every incorrect answer she lost 1 point. Her final score was 54 points. The system of equations describes the relationship between the number of questions she answered correctly and the number of questions she answered incorrectly. Part of the solution of the equations is y = 2. What does this value represent?
x+y=30
2x−y=54


A. the number of questions Natalie answered incorrectly
B the number of questions Natalie answered correctly
C. the number of points Natalie lost from questions she answered incorrectly
D. the number of points Natalie earned from questions she answered correctly