Set 3: Linear Inequalities (Intermediate)

Choice A is correct. Choice A is the correct answer. Combine the two conditions. 1. Below $y=3 x$: $y < 3 x$ 2. Above $y=3 x-4$: $y > 3 x - 4$ 3. Combine: $3x - 4 < y < 3 x$ Strategic Tip: This describes a band between two parallel lines. Choice B is incorrect because it implies $3x < 3 x - 4$, which is impossible ($0< -4$ is false). Choice C is incorrect because "or" would cover the entire plane (except the lines). Choice D is incorrect because it describes the region above the top line and below the bottom line (empty set).