Answer: zero elasticity
Step-by-step explanation:
A demand or supply curve with zero elasticity would be horizontal in appearance. Elasticity refers to the responsiveness of quantity demanded or quantity supplied to a change in price. A demand or supply curve with zero elasticity means that the quantity demanded or supplied does not change at all in response to a change in price. This is represented by a horizontal line on a graph, because the quantity remains constant regardless of the price.