Suppose that the following events occur one at a time: The price of crude oil rises. The price of a car rises. All speed limits on highways are abolished. Robot technology cuts car production costs. Which of these events will increase or decrease (state which): The demand for petrol? The supply of petrol? The quantity of petrol demanded? The quantity of petrol supplied?

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Suppose that the following events occur one at a time:

The price of crude oil rises.

The price of a car rises.

All speed limits on highways are abolished.

Robot technology cuts car production costs.

Which of these events will increase or decrease (state which):

The demand for petrol?

The supply of petrol?

The quantity of petrol demanded?

The quantity of petrol supplied?

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