Choice A is the correct answer. Check for a constant rate of change.

1. Check A: As $x$ goes up by 1, $y$ goes up by 2 ($7-5=2, 9-7=2, 11-9=2$). Constant rate $\rightarrow$ Linear.
2. Check B: $y$ doubles (Exponential).
3. Check C: Differences are 3, 5, 7 (Quadratic).
4. Check D: Differences are -1, -2, -3 (Not constant).

💡 Strategic Tip: In a linear table, the first differences of $y$ are constant (for equal x-steps).

Choice B is incorrect (Exponential).Choice C is incorrect (Quadratic).Choice D is incorrect.