Answer:
4. The demand for gasoline-powered automobiles would increase and the equilibrium price of gasoline-powered automobiles would increase.
Step-by-step explanation:
Substitute goods are goods that can be used in place of each other.
If the price of electric automobiles rises, the automobile becomes more expensive for consumers. Consumers would reduce the quantity demanded of the electric automobile and shift its demand to gas powered automobiles.
As a result, the demand for gas automobiles increases and the equilibrium price would increase too.
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