Answer:
Price Elasticity of Demand is -4
Explanation:
We can see the graph and easily calculate the Q1 which is 120 units at P1 $140 and Q2 which is 80 units at P2 $160 price.
The starting point formula for calculating price elasticity of demand is given as under:
Price Elasticity of Demand = (ΔQ / Q2) / (ΔP / P2)
Here
ΔQ = Q1 - Q2 = 120 - 80 = 40 units
ΔP = P1 - P2 = 140 - 160 = - $20
By putting value in the above equation, we have:
Price Elasticity of Demand = (40 Units / 80 Units) / (-$20 / $160)
Price Elasticity of Demand = -4
Price Elasticity of Demand is -4
Since in the graph it is mentioned that Q1 which is 120 units at P1 $140 and Q2 which is 80 units at P2 $160 price.
So we know that
Price Elasticity of Demand = (ΔQ / Q2) / (ΔP / P2)
where
ΔQ = Q1 - Q2 = 120 - 80 = 40 units
ΔP = P1 - P2 = 140 - 160 = - $20
Now
Price Elasticity of Demand
= (40 Units / 80 Units) / (-$20 / $160)
= -4
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