What will increase in the price result in if the demand curve for good X is downward-sloping?

As we know that, the law of demand states the -ve relationship between the price and quantity of demand and, I can't say when the price of goods is decreased, so the smaller quantities of demand will be changes. The demand curve can be in smooth curve/curvature (I mean downward straight line/download curve shape from the origin) that's curve demand show when we decrease in large price but small changes in quantity demand.