Algebra-1

Question Analysis
This question tests the student's ability to distinguish between discrete and continuous data. 

Key Concept Explanation
Continuous data is obtained through measurement and can take any value within a certain interval. Its values change continuously and can theoretically be infinitely subdivided.

Step-by-step Solution
The data in question is "the distance a runner travels in a marathon, measured in kilometers."
Distance is a measurable quantity that can be subdivided into smaller units (kilometers, meters, centimeters). There are no gaps between possible values (e.g., between 42 km ...