When income levels of consumers increase:
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For cell phones, which are considered a normal good, the demand curve would shift to the right. This is because as consumers have more income, they are likely to purchase more cell phones.
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For instant noodles, which are considered an inferior good, the demand curve would shift to the left. As consumers' income rises, they tend to buy fewer inferior goods, such as instant noodles, and opt for higher-quality alternatives instead.
Based on this analysis, the correct response is:
The demand curve for cell phones would shift to the right, and the demand curve for instant noodles would shift to the left.