Which relation is a function?

A.
(6, 5), (1, 1), (6, 4)

B.
(0, 1), (2, 3), (2, 5)

C.
(8, –2), (–2, 5), (6, 0)

D.
(–2, 3), (–5, 9), (–5, 3)

Question

Which relation is a function?	
 
 A.
(6, 5), (1, 1), (6, 4)
 
 B.
(0, 1), (2, 3), (2, 5)
 
 C.
(8, –2), (–2, 5), (6, 0)
 
 D.
(–2, 3), (–5, 9), (–5, 3)

anonymous · Answer

the one where there is no repeat in the first coordinate

anonymous · Answer

for example $$(6, 5), (1, 1), (6, 4)$$ is not a function, because the $6$ repeats

anonymous · Answer

clear?

anonymous · Answer

not that much

anonymous · Answer

lets do them one at a time

anonymous · Answer

$$(6, 5), (1, 1), (6, 4)$$ NO
 because there are two $6$ in the first coordinates
one in $(6,5)$ and another in $(6,4)$

anonymous · Answer

$$(0, 1), (2, 3), (2, 5) $$ NO because there are two $2$s in the first coordinate, one in $(2,3)$ and one in $(2,5)$

anonymous · Answer

so it's C?

anonymous · Answer

$$(8, –2), (–2, 5), (6, 0)$$ YES because all the first numbers are distinct

anonymous · Answer

right, as always, the answer is C