Answers

Sheetal Parihar
Aug 2, 2020

Related goods are either substitutes or complementary

Substitutes Goods : When price of a substitute falls, it becomes cheaper than the given good. So the consumer substitutes it for given good will decrease. Similarly, a  rise in the price of substitute will result in increase in the demand for given good.
For example : – Tea and Coffee.

Complementary Goods : When the price of a complementary good falls its demand rises and the demand for the given good will increase. Similarly when price of  complementary good increases, then demand for given good decreases.
For example : – Car & Petrol.