Production Possibility Frontier Trade-offs Steps:

• Examine table combinations for maximum resource use in producing X and Y.
• Compare Y output levels as X output rises, noting the inverse relationship.
• Check each option against table data: plot or calculate Y relative to X.
• Verify D by ensuring all Y values satisfy Y ≤ 2X across combinations.

Why D is correct:

• In a PPF, resource constraints limit combinations; table data shows Y never exceeds 2X, reflecting the maximum Y per X unit under full capacity.

Why the others are wrong:

• A: Y decreases with X, but question asks for Y in terms of X relation, not just trade-off.
• B: Some points have Y > X, violating "always below."
• C: Y varies (decreases) with X, not constant.

Final answer: D