Elasticity of Demand Concepts

The video tutorial explains the concept of demand elasticity, starting with a given demand function D(p) = -7p + 144. It covers how to calculate the elasticity of demand at a specific price, $12, and discusses the implications of the elasticity value on total revenue. The tutorial also explains how to determine the price at which demand is unit elastic, meaning total revenue is maximized. The video provides a detailed walkthrough of the calculations involved, using two forms of the elasticity formula, and emphasizes the non-negative nature of elasticity.

What is the demand function given in the video?

• D(p) = -7p + 144

• D(p) = -144p + 7

• D(p) = 7p - 144

• D(p) = 144p - 7

Which of the following is a form of the elasticity of demand function?

• E(p) = p * D'(p) / D(p)

• E(p) = p / D(p)

• E(p) = -p * D'(p) / D(p)

• E(p) = D(p) / p

Why is the elasticity of demand always non-negative?

• Because D'(p) is positive

• Because demand is always increasing

• Because prices are always positive

• Because the opposite of a negative is positive

What is the derivative of the demand function D(p) = -7p + 144?

• 144

• -7

• 0

• 7

What is the elasticity of demand at a price of $12?

• 1.4

• 1.0

• 2.0

• 0.6

What does an elasticity greater than 1 indicate about demand?

• Demand is perfectly elastic

• Demand is elastic

• Demand is inelastic

• Demand is unit elastic

At what price is the total revenue maximized according to the video?

• $12.00

• $7.00

• $10.29

• $14.00

What equation is used to find the price at which unit elasticity occurs?

• E(p) = 0

• E(p) = 1

• E(p) = 2

• E(p) = -1

How is the equation 7p = 144 - 7p solved for p?

• By multiplying both sides by 7

• By subtracting 7p from both sides

• By dividing both sides by 7

• By adding 7p to both sides

What is the approximate price for unit elasticity rounded to the nearest penny?

• $10.00

• $10.29

• $11.00

• $9.50