Determine which relation is a function.

A.
{(–5, 1), (–5, 0), (–2, 1), (–1, 4), (6, 2)}

B.
{(–5, 1), (–2, 0), (–2, 2), (3, 4), (6, 2)}

C.
{(–5, 1), (–2, 0), (–1, 1), (2, 4), (6, 3)}

D.
{(–5, 3), (–2, 0), (–1, 2), (6, 4), (6, 3)}

Question

Determine which relation is a function.	
 
 A.
{(–5, 1), (–5, 0), (–2, 1), (–1, 4), (6, 2)}
 
 B.
{(–5, 1), (–2, 0), (–2, 2), (3, 4), (6, 2)}
 
 C.
{(–5, 1), (–2, 0), (–1, 1), (2, 4), (6, 3)}
 
 D.
{(–5, 3), (–2, 0), (–1, 2), (6, 4), (6, 3)}

oregonduck · Answer

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misty1212 · Answer

HI!!

misty1212 · Answer

pick the one that does not have any repeats in the first coordinate

misty1212 · Answer

for example, not 
{(–5, 1), (–5, 0), (–2, 1), (–1, 4), (6, 2)}
 
because it has two $-5$'s

anonymous · Answer

I'm guessing it might be c ?

misty1212 · Answer

yes, it is always c
when in doubt, charlie out