Imagine a consumer's level of satisfaction from consuming various quantities of two goods is represented by a three-dimensional landscape, where the 'elevation' at any point corresponds to the level of satisfaction. If you were to draw a single, continuous contour line on this landscape, connecting all points that have the exact same elevation, what would this line represent in economic terms?

A consumer's preferences for two goods can be visualized as a three-dimensional 'utility surface,' similar to a mountain. The two-dimensional representation of these preferences is an 'indifference map,' which is like a topographical map of that mountain. Match each feature of the 3D utility surface (the mountain) with its corresponding feature on the 2D indifference map (the topographical map).

The Topography of Preferences

When a consumer moves from one point to another along the same indifference curve, this is analogous to walking directly up the steepest part of their three-dimensional utility 'hill'.

Interpreting Preference Landscapes

Evaluating the Topographical Analogy for Consumer Preferences

A consumer's satisfaction from consuming two goods can be visualized as a three-dimensional 'hill' of utility. If this hill has a single, distinct peak representing the absolute maximum possible satisfaction, how would this peak be represented on a corresponding two-dimensional contour map of the consumer's preferences?

A consumer's preferences for two goods are visualized as a two-dimensional contour map derived from a three-dimensional 'satisfaction surface'. If this map consists of a series of parallel, straight lines, what is the most likely shape of the underlying three-dimensional surface?

Comparing Satisfaction Landscapes

The Topography of Preferences