Which relation is a function?
A.

(5, –2), (4, 6), (–3, –2), (0, 4)
B.

(–1, –2), (3, –5), (–1, –5), (2, –2)
C.

(4, 3), (3, 2), (–1, 5), (4, 0)
D.

(–4, –4), (3, –3), (–4, 4), (–3, 3)

Question

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

solomonzelman · Answer

the ranges do not repeat in which option ?

solomonzelman · Answer

you can exclude A and B based on that, and then decide between D and C

anonymous · Answer

are you asking me?

solomonzelman · Answer

I am not asking myself, so if you exclude me, then yes.. :)

anonymous · Answer

im sorry

solomonzelman · Answer

You don't need to be sorry

anonymous · Answer

how can you tell its a function

solomonzelman · Answer

Well, I was first able to exclude C and D

solomonzelman · Answer

I mean to exclude a and b

solomonzelman · Answer

It looks like C is it.

anonymous · Answer

ok but i mean what is a function

solomonzelman · Answer

Function ? Don't really know how to define it, but it can be a line or a curve.
In other words, it can be an exponential equation or a linear equation.

anonymous · Answer

ok

anonymous · Answer

so its c

solomonzelman · Answer

yup

anonymous · Answer

@SolomonZelman is this a function http://media.education2020.com/evresources/2003-08-01-00-00_files/i0110002.jpg