The diagram below shows a set of budget lines facing a household. 
FIGURE 6-8
-Refer to Figure 6-8.The movement of the budget line from ab to ef could be caused by
Definitions:
Memory
The cognitive processes underlying the storage, retention, and retrieval of information.
Cultural Syndrome
Patterns of behavior, beliefs, and experiences that can be identified within specific cultural contexts or ethnic groups.
Independent
The state of being not influenced or controlled by others in matters of opinion, conduct, or other choices.
Group Goals
Objectives or outcomes that are intended to be achieved through the collective effort of a group of people.
Q24: If the price elasticity of demand is
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Q65: Refer to Figure 6-4.For both goods,the price
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Q158: If two goods,X and Y,have a positive