About total utility, marginal utility, and the law of diminishing marginal utility.
How rational consumers compare marginal utility-to-price ratios for products in purchasing combinations of products that maximize their utility.
How a demand curve can be derived by observing the outcomes of price changes in the utility-maximization model.
How the utility-maximization model helps highlight the income and substitution effects of a price change.
About budget lines, indifference curves, utility maximization, income and substitution effects, and demand derivation in the indifference curve model of consumer behaviour.
(Appendix)