Time is measured along the x-axis. What is measured along the y-axis? employment levels
prices
economic output
demand

economic output

Explanation:

The "x-axis" is also known as the "horizontal axis" while the "y-axis" is also known as the "vertical axis."

When it comes to "business cycles," a graph is used in order to show how the economic activity of the business changes in response to time. In this case, time (e.g. months, years, etc.) is measured in the "x-axis" while economic output (e.g. GDP) is measured in the "y-axis."

So, this explains the answer.

c. economic output

Explanation:

yes because there are aliens