The industry demands the curve that slopes downward because if the price of the goods increases then the quantity will decrease and this is demonstrated in the Law of supply and Demand
Step-by-step explanation:
The changes in the curve indicate the increase and in the decrease of the products and their demand. When a market is perfectly competitive the demand curve will be downward sloping
This indicates the fact that if the price of the ordinary good increases the quantity or the demand for that good decreases and finally the firm will not sell any products It will exhibit a horizontal line because the in the individual demand curve the exact substitutes are found in the market