Answer:
The correct answer is downward sloping; downward sloping.
Explanation:
In a perfect competition the demand curve for an individual firm is a horizontal line parallel to the x axis. This happens because the firm is a price taker and operate on the price determined by the intersection of demand and supply curves. Any increase in the price will cause the demand to become zero.
While in the monopolistic market a single firm has downward sloping demand curve. Here, the firm is price maker and decides price level. Though, the consumers will demand more at lower price.
The industry supply curve for both will be downward sloping. This happens because, the firms consumers in a market will always demand more at low prices. The demand and price are inversely related.
