Question: Question 4 (1 point) ~/ Saved Walt considers x and y to be perfect substitutes. They originally cost $10 and $9 respectively. His income is

Question 4 (1 point) ~/ Saved Walt considers x and y to be perfect substitutes. They originally cost $10 and $9 respectively. His income is $720. One day the price of x drops to $8. 6) The substitution effect increases the quantity of x by 90. O The income effect increases the quantity of x by 80. O The substitution effect increases the quantity of y by 80. 0 None of the other choices. 0 The income effect increases the quantity of y by 90
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