Question 1153106: Which ordered pair (x,y) makes this relation a function?
{(2,3),(-2,5),(4,4),(-4,5),(x,y)}
A.(-4,-1)
B.(-1,-1)
C(-2,-1)
D(2,-1)
Answer by MathLover1(20850)   (Show Source):
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Which ordered pair ( , ) makes this relation a function?
{ ( , ),( , ),( ,),( ,),(,) }
A relation from a set to a set is called a  if each element of is related to exactly one element in .
A.(, )-> cannot be because (,)
B.(,)-> can be because is unique
C(,)-> cannot be because (,)
D(,)-> cannot be because (,)
so, answer is
B. (,)
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