Which relation is a function?

A.
{(8, –1), (2, –1), (3, 8), (2, 5}

B.
{(7, 12), (1, –5), (3, –10), (2, –5)}

C.
{(–3, 4), (–2, 5), (0, 9), (0, 12)}

D.
{(1, 2), (1, 5), (1, –1), (1, 4)}

Question

Which relation is a function?	
 
 A.
{(8, –1), (2, –1), (3, 8), (2, 5}
 
 B.
{(7, 12), (1, –5), (3, –10), (2, –5)}
 
 C.
{(–3, 4), (–2, 5), (0, 9), (0, 12)}
 
 D.
{(1, 2), (1, 5), (1, –1), (1, 4)}

black_ninja123 · Answer

Do you know what a function is?

black_ninja123 · Answer

A function is a special relationship where each input has a single output.

anonymous · Answer

The answer is B

anonymous · Answer

Thanks I know what a function is.