The answer is B.
Example:
Plug in for x.
x | y
-------------------------------
1 | 4
3 | 6
7 | 10
9 | 12
11 | 14
Equation: y = x + 3.
y = 1(plug in x) + 3 = 4 which is y.
y = 3 + 3 = 6 which is y.
y = 7 + 3 = 10 which is y.
y = 9 + 3 = 12 which is y.
y= 11 + 3 =14 which is y.
Answer: Equation y = x + 3