Question

the demand for pen and ink is​

Answer 1

Answer:

When two goods are in demand for single purpose they are called as Joint demand. Pen and ink are joint demand for writing purpose.

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Answer 2

The demand for pen and ink is complementary.

• Complementary goods are goods that diamonds that are complementary meaning when the price of one good goes up the demand for another goes down.

• Pen and ink is a product that is complementary as one needs to buy ink when buying a pen. This shows that when the price of a pen goes up the demand falls thus affecting the demand for the ink as well.