站和0
預算線為3 .x+選.),三3叫(20)+乃(45) 9人 了RE人
3Yv+2D"三60+45 =三105
* 9 x
將4 代入預算線可得其=15 之 l
焉 3 急 2 冰入 V s
、 一Beforeen 2017 和4 2抽 1
人 0 n2017, Bruce spent his income on two goods, and 品 辣和ns 2018
de price of good xz rose by 8% and the price CO
t he bou 由 mo
# Bruce bought fhe same anmount of z as he bought im 2017/, 9 峙 作 只 呈
代罰 good y 和an he had bought in 2017.
遍, Sanormajl good. K XY XX 只: 人
“別當 is an imferior good 六 8 汪
e XX
人 8an nmferior good ~ 全 48 /- 1 23嘩2
0 Nofhing can be said about inferiority or superiority, since we don't know what
fappened fto income.
(0 Bruce 5 acting Trrationally,since the ITelative prices of xx and > did not
“2人
參考解析 店於 2017 年到 2018 年 與 均上漲
記
JM
J 4 人
人0
