Answered

Which relation is a functiona) {(2.4), (2,-7) (2,11), (2,-15)}

B{(0,-7), (4,-8), (0,-9,) (6,-10)}
C{(-1.3), (5,3), (-6,7), (5,0)}
D{(6.0), (-7,14), (-2,-5), (2.5)}?

Verified Answer :

d is a function  because  there are no repeated x values 

for example b is not a function because we have (0,-7) and (0,-9)

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