As Sam moves rightward along his indifference curve, his marginal rate of substitution

Question

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According to the law of diminishing marginal utility, as a consumer consumes more of a good, the marginal utility derived from each additional unit decreases. Therefore, as Sam moves rightward along his indifference curve (consuming more of one good), his marginal rate of substitution (the rate at which he is willing to trade one good for another) will decrease, indicating diminishing marginal utility.

As Sam Moves Rightward Along His Indifference Curve, His Marginal