The inverse relationship between price and quantity demanded explains which shape of the demand curve?

• A. Because as price decreases, consumer demand for all goods increases
• B. Because higher prices always reduce consumer spending
• C. Because the law of supply governs this relationship
• D. Because as price falls, quantity demanded increases

Answer: (D)

The main idea tested is the inverse relationship between price and quantity demanded, which creates a downward-sloping demand curve. When price falls, more people are willing and able to buy the good, so the quantity demanded increases. That’s exactly what the statement “as price falls, quantity demanded increases” expresses, so it best describes the shape of the curve.

The other ideas miss the mark: one statement implies demand for all goods rises with lower price, which isn’t how demand is defined for a single good. Another suggests that higher prices always reduce consumer spending, which doesn’t address the price–quantity relationship on the demand side. The final option points to the law of supply, which governs producers’ behavior, not consumers’ demand.