The demand schedule reveals that when the price is Rs. 6, the quantity demanded is 10 units.

If the price happens to be Rs 5, the quantity demanded is 20 units, and so on.

Hence when price decreases quantity demand increases.

The Demand Curve is given below.

The going concern principle allows the company to defer some of its prepaid expenses until future accounting periods. 

DD1 is the demand curve drawn on the basis of the above demand schedule. 

The dotted points D, P, Q, R, S, T and U show the various price-quantity combinations. These are called as demand points.

The first combination is represented by the first dot and the remaining price- quantity combinations move to the right toward D1.

There is no change in the tastes and preferences of the consumer;
The income of the consumer remains constant
There is no change in customs
The commodity to be used should not confer distinction on the consumer 
There should not be any substitutes of the commodity 
There should not be any change in the prices of other products
There should not be any possibility of change in the price of the product being used
There should not be any change in the quality of the product
The habits of the consumers should remain unchanged. Given these conditions, the law of demand operates. 
If there is change even in one of these conditions, it will stop operating.

1. War

If shortage is feared in anticipation of war, people “may start buying for building stocks or for hoarding even when the” price rises.

2. Depression

During a depression, the prices of commodities are very low and the demand for them is also less. This is because of the lack of purchasing power with consumers.

3. Griffin Paradox

If a commodity happens to be a necessity of life like wheat and its price goes up, consumers are forced to curtail the consumption of more expensive foods like meat and fish, and wheat being still the cheapest, food they will consume more of it. 

4. Ignorance Effect

Consumers buy more at a higher price under the influence of the “ignorance effect”, where a commodity may be mistaken for some other commodity, due to deceptive packing, label, etc.

5. Speculation

When a group unloads a great quantity of a thing on to the market, the price falls and the other group begins buying it.

When it has raised the price of the thing, it arranges to sell a great deal quietly. Thus when price rises, demand also increases.