Answer:
3.05
1.38
0.725
Explanation:
Price elasticity of demand measures the responsiveness of quantity demanded to changes in price of the good.
Arc elasticity of demand = midpoint change in quantity demanded / midpoint change in price
Midpoint change in quantity demanded = change in quantity demanded / average of both demands
Price $25-$20
change in quantity demanded = 40 - 20 = 20
average of both demands = (40 + 20) /2 = 30
Midpoint change in quantity demanded = 20/30 = 0.67
midpoint change in price = change in price / average of both price
change in price = $25 - $20 = $5
average of both price = ($25 + $20) / 2 = 22.5
Price $20-$15
change in quantity demanded = 60 - 40 = 20
average of both demands = (60 + 40) /2 = 50
Midpoint change in quantity demanded = 20/50 = 0.4
midpoint change in price = change in price / average of both price
change in price = $20 - $15 = $5
average of both price = ($15 + $20) / 2 = 17.5
midpoint change in price = 5 / 17.5 = 0.29
0.4/0.29 = 1.38
Price elasticity of demand = 0.67 / 0.22 = 3.05
change in quantity demanded = 80 - 60 = 20
average of both demands = (80 + 60) /2 = 70
Midpoint change in quantity demanded = 20/70 = 0.29
midpoint change in price = change in price / average of both price
change in price = $15 - $10 = $5
average of both price = ($15 + $10) / 2 = 12.5
5/12.5 = 0.4
