Final answer:
A higher intercept term in the demand for personal pizzas indicates a higher initial demand. Three demand determinants that can affect planned purchases are income, price of substitute goods, and taste and preferences. These determinants can have a positive relationship with the quantity demanded of personal pizzas.
Step-by-step explanation:
One hypothesis related to the equation intercept term (800) in the demand for personal pizzas can be that a higher intercept indicates a higher initial demand for personal pizzas. This means that at a price of 0, there would still be a certain quantity demanded.
Three demand determinants that can affect planned purchases are:
Income: A higher income would be positively related to quantity demanded. As income increases, individuals have more disposable income to spend on personal pizzas, resulting in an increase in quantity demanded.
Price of Substitute Goods: If the price of substitute goods, such as hamburgers or sandwiches, increases, consumers may shift their preference to personal pizzas, resulting in a positive relationship between the price of substitute goods and quantity demanded of personal pizzas.
Taste and Preferences: If personal pizzas become more popular or trendy, it could result in a positive relationship between taste and preferences and the quantity demanded of personal pizzas.