Which of the following relations is not a function? Mark all that apply.
O A. {(-3, 8), (9, -12), (4, -1), (3, 8)}
O B. {(4,5),(4, - 7),(4,2), (4,0)}
O C. {(0,0), (4,0), (0.5, 4), (-4,4)}
OD. {(-6, -1),(5, -1), (0, -1), (3, -1)}
O E. {(5, -1}, (4, -2), (3, -3), (5, 1)}

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.