The problem asks to find the median of the number of kilometers Roger ran over the past 5 days, based on the given bar graph.

1. Problem Description

The problem asks to find the median of the number of kilometers Roger ran over the past 5 days, based on the given bar graph.

2. Solution Steps

First, we read the data from the bar graph.

- Thursday: 0 kilometers

- Friday: 0 kilometers

- Saturday: 5 kilometers

- Sunday: 4 kilometers

- Monday: 2 kilometers

So, the data set is $\{0, 0, 5, 4, 2\}$.

To find the median, we first sort the data in ascending order: $\{0, 0, 2, 4, 5\}$.

Since there are 5 data points, which is an odd number, the median is the middle value.

The middle value is the $\frac{5+1}{2} = 3$rd value in the sorted data set.

The 3rd value in the sorted data set is

2.

3. Final Answer

The median is 2.