Question
How is budget line different from budget set?

Answer

Basis of DifferenceBudget SetBudget Line
1. MeaningBudget set is defined in terms of this equation: $P_1 X_1+P_2 X_2 \leq Y$Budget line is defined in terms of this equation: $P _1 X _1+ P _2 X _2= Y$
2. Combinations includedBudget set includes all combinations of goods X and Y (given their prices) on which the actual expenditure is equal to or less than the given income of the consumer.Budget line includes only such combinations of goods X and Y (given their prices) on which the actual expenditure by the consumer is exactly equal to his given income. Specifically, it does not include such combinations which are attainable but where: consumer's expenditure < consumer's income.

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