An increase in income raises market demand for normal goods. such as restaurant meals, airline flights, and nights and hotels.   An increase in income reduces market demand for inferior goods , such as canned fruits and long-distance bus trips.

Two goods are substitutes when an increase in the price of one increases demand for the other -- for example, Coca-Cola and Pepsi . Two goods are complements when an increase in the price of one decreases demand for the other -- for example, skis and other skiing equipment (poles, boots, and so on).

Higher input prices make it more expensive to produce a good, which reduces supply.  (In other words, sellers would need to receive a higher price to be willing to sell the same amount.)  For example, an increase in the price of  paper raises the prices of newspapers, magazines, and books.