Which table of ordered pairs represents a linear function?

x y
−6 26
0 3
6 26
12 101

x y
−6 −3
0 3
6 1
12 2

x y
−6 −3
0 3
6 9
6 3

x y
−6 −3
0 2
6 7
12 12

Question

Which table of ordered pairs represents a linear function?

x	y
−6	26
0	3
6	26
12	101

x	y
−6	−3
0	3
6	1
12	2

x	y
−6	−3
0	3
6	9
6	3

x	y
−6	−3
0	2
6	7
12	12

tkhunny · Answer

Well, #3 isn't even a function.  Maybe you mistyped something.
If the x-values are in increasing order, the y-values must go in a single direction.  #1 Nope.  #2 Nope.
See if you can prove #4.

nikki_skellington · Answer

im not sure on how to do it though. Other ones yes but this one is complicated