Answer:
Derived demand.
Explanation:
Derived demand in economics can be defined as the demand for a factor of production such as land, capital, labour or goods and services that occurs as a result of the demand for another intermediate or finished product.
This simply means that demand by consumers for a product produced by the firm largely affects the company's products.
Hence, according to derived demand the quantity of bulbs Philips makes is related to how many flashlights Rayovac sells.