Does the relationship show a function?

Question

x- values
-5
-3
0
1
2
4

y=2x+3

y = 2(- 3) + 3

y = 2(0) + 3

y = 2(1) + 3

y = 2(2) + 3

y = 2(4) + 3

y-values
(-5,-7)
(-3,-3)
(0,3)
(1,5)
(2, 7)
(4, 11)

Answer 1

Yes, the relationship shows a function. Each input (x-value) corresponds to exactly one output (y-value).