Thomas faces prices of $6 for a unit of good X and $30 for a unit of good Y. At his optimum, Thomas is willing to give up 1 unit of good Y for __________ units of good X.

Optimum

The most favorable condition or level that achieves the best possible outcome or efficiency.

Good X

A placeholder term for any specific good, product, or item within economic analysis.

Good Y

A hypothetical product or item, often used in economic models and theories to illustrate various economic principles and interactions.