Figure 3.7a - Diagram of Karim's Optimal Choice at a €30 Wage

A student is spending their entire weekly allowance on a combination of two goods: comic books and video games. At their current consumption point, their indifference curve intersects their budget constraint, and the slope of the indifference curve is steeper than the slope of the budget constraint. Based on this information, what must be true about the student's current situation?

Analyzing Consumer Choice

Optimality and the Tangency Condition

A consumer makes choices between two goods. Match each description of a consumption point on a graph with its correct economic interpretation.

A consumer is choosing between two goods. If, at their current consumption bundle, they are personally willing to give up 2 units of the good on the vertical axis to get 1 more unit of the good on the horizontal axis, but the market only requires them to give up 1 unit of the vertical-axis good to get 1 more unit of the horizontal-axis good, then the consumer has found their optimal choice.

Graphical Analysis of Consumer Choice

A student is using a graph to determine the optimal combination of two goods for a consumer. Arrange the following steps in the correct logical sequence to find this optimal choice.

Critique of an Optimization Strategy

When a consumer's optimal choice is represented by a point of tangency between their budget line and an indifference curve, it signifies that the personal, subjective value they place on one good in terms of the other is precisely __________ the objective, market-determined trade-off rate between the two goods.

A consumer is spending their entire income on two goods, X and Y. They are currently consuming a bundle on their budget line where their indifference curve intersects it. At this bundle, the amount of good Y the consumer is willing to give up to obtain one more unit of good X is greater than the amount of good Y they are required to give up by the market. To reach the point of maximum utility, this consumer should:

The Tangency Condition for Utility Maximization