Which set of ordered pairs in the form of (x y) does not represent a function of x
(-1 2), (3,-2), (0,1), (5,2)
(-1,2), (3,2), (-2,2), (0,2)
(-1,2), (3,-2), (0,1), (3,5)
(-1,2), (2,3), (3,-2), (-2,0)

The oates family went out for dinner the price of the meal was $33.95 the sales tax was 7.25% of the price of the meal . the tip was 15% of the meal and the sales tax . how much money did the oates family pay for the meal, including tax and tip