In the diagram a consumer's budget line shifts from GH to JK.
Regardless of any other changes that might occur, what must be correct?
1 )
There has been an increase in the consumer's money income.
There has been an increase in the consumer's real income.
3 )
There has been an equal proportionate increase in the price of X and Y.
4 )
There has been an equal proportionate decrease in the price of X and Y.
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