問一題個經的題目了~感謝各位板大 - 經濟

※ 引述《venson (venson)》之銘言：
: although some of the statements below are true of both normal goods
: and inferior goods, only one of the statement defines a normal good. which one?
: ===================================================
: 答案是：normal goods are those for which the income effect is negative.
: 詳解是 正常財之價格變動與需求量的變動關係，其中替代效果為負相關，所得效果亦為負相關。
: ===================================================
: 我的疑問：但是正常財若用x-y圖來畫，替代與所得效果不都是往右跑嗎?
: 那麼這種題目，到底要用哪種解好呢?
X,Y都是正常財
Px↓
S.E. X↑,Y↓
T.E. X↑,Y↑

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