Pressure inversely proportional to base area

Steps:

• Pressure P is force F divided by area A: P = F/A.
• Force F is the weight mg, constant since mass m and gravity g are the same for all blocks.
• Thus, P = mg/A, so P decreases as A increases.
• The graph of P versus A is a decreasing hyperbola.

Why D is correct:

• D shows a hyperbolic curve where pressure decreases inversely with increasing base area, matching P = F/A.

Why the others are wrong:

• A shows direct proportion (increasing line), but pressure decreases with area.
• B shows linear decrease, but the relationship is nonlinear (hyperbolic).
• C shows constant pressure, but pressure varies with area.

Final answer: D