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Which of the following lists of ordered pairs is a function?
A. (2,4),(0,2),(2,-4),(5,3)
B. (1,6),(2,7),(4,9),(0,5)
C. (1,2),(1,-2),(3,2),(3,4)
D. (0,2),(2,3),(0,-2),(4,1)


Sagot :

B. All of the x values are different. None repeat