1- Which statement describes the slope of the following demand function. P = 9 - 30.* Slope = -3. This indicates that the price drops by 3 units for each successive unit increase in quantity demanded. Slope = 3. This indicates that the price drops by 3 units for each successive unit increase in quantity demanded. Slope = -3. This indicates that the price increase by 3 units for each successive unit Increase in quantity demanded Slope = 3. This indicates that the price drops by 3 units for each one unit decrease in quantity demanded. 1 Slope = 9. This indicates that the price drops by 9 units for each successive unit increase in quantity demanded