Determine which set of ordered pairs is a function.

A.

{(–1, 3), (1, 4), (–1, 5)}

B.

{(5, 3), (–6, 3), (–2, 4)}

C.

{(0.5, 1.6), (1, 1.75), (1.5, 2.3), (0.5, 3.6)}

D.

{(1, 2), (–5, 4), (3, 6), (–5, 2)}

Question

Determine which set of ordered pairs is a function.






A. 


{(–1, 3), (1, 4), (–1, 5)} 




B. 


{(5, 3), (–6, 3), (–2, 4)} 




C. 


{(0.5, 1.6), (1, 1.75), (1.5, 2.3), (0.5, 3.6)} 




D. 


{(1, 2), (–5, 4), (3, 6), (–5, 2)}

anonymous · Answer

In order to determine if ordered pairs is considered a function or not, look at the domains, also known as the input, or x value. The domain is the first number in an ordered pair. It can only be a function if there are no repeating x values. So. look at your answer choices and determine which one has no repeating domain/x value. (It is okay to have repeating y values, though)

anonymous · Answer

whats the answer @Shirobara

anonymous · Answer

We can rule out A, because -1 appears twice, we can rule out C, because 0.5 appears twice, and we can rule out D, because -5 appears twice, leaving us with B as an answer because no domain/the first number in the ordered pairs, repeats.