If the price of bread goes up, the demand for bread and butter would go down as shown in option 1.
Demand refers to customer interest in products. The increase in the price of the products causes this interest to decrease, causing the demand for the product to decrease.
When the demand for a product decreases, the demand for complementary products also decreases. Therefore, if the price of bread increases, the demand for bread decreases, and the demand for butter also decreases.
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