Answer: Demand is Unit - Elastic over this price range.
Step-by-step explanation:
When total revenue remains the same over various price level then the demand curve is unitary elastic.
Unit-Elastic demand - It depicts a demand curve which is perfectly responsiveness to changes in cost. That is, the amount of demand changes as indicated by a similar percentage changes in prices.
A demand curve with an elasticity of 1 is called as unitary elasticity of demand.