Amisha's Engel curve for potato chips is I = 300C, where I is weekly income and C measures the number of bags of potato chips. Amisha considers potato chips a(n):

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Amisha's Engel curve equation I = 300C indicates that as income (I) increases, consumption of potato chips (C) also increases (since you need more income to buy more chips at a constant rate of 300 per bag). This relationship suggests that potato chips are a normal good for Amisha, as consumption increases with an increase in income, which is characteristic of normal goods.

Amisha's Engel Curve for Potato Chips Is I = 300C