Answer:
The law of diminishing marginal utility helps to explain the negative slope of the demand curve and the law of demand. ... If the satisfaction obtained from a good decline, then buyers are willing to pay a lower price, hence demand price is inversely related to quantity demanded, which is the law of demand.
Explanation:
The price a consumer is willing to pay for a good depends on his marginal utility, which declines with each additional unit of consumption, according to the law of diminishing marginal utility. Therefore, the price decreases for a normal good when consumption increases.