What is the slope of a perfectly inelastic demand curve,and why
A)negatively sloped, because buyers decrease their purchases when the price rises
B)vertical, because buyers purchase the same amount whether the price rises or falls
C)positively sloped, because buyers respond by increasing their purchases when price rises
D)horizontal, because buyers increase their purchases by huge amounts with slight changes in price

Question

Quizplus · Accepted Answer

A perfectly inelastic demand curve means that the quantity demanded does not change, regardless of changes in price. Thus, the demand curve is vertical, indicating that buyers will purchase the same amount whether the price rises or falls. Therefore, the slope of a perfectly inelastic demand curve is zero because it is a vertical line.

What Is the Slope of a Perfectly Inelastic Demand Curve,and