Set 14: Linear Functions

Choice A is correct. 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.