We use budget constraints to illustrate the goods and services that can be afforded at current prices and income, and how the available choices change when income and/or prices change.
Tastes or preferences are a little more complex to represent. Economists represent tastes graphically with indifference curves, but many professors prefer not to introduce indifference curves in introductory course. We've created a separate section (link below) titled Advanced Consumer Choice Material in which we employ indifference curves.
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