To find the median of the temperatures, we first need to organize the temperatures in ascending order. The low temperatures for the week are:
2°, -3°, -9°, -11°, 1°, -8°, -9°.
Now, let's arrange these temperatures in order:
-11°, -9°, -9°, -8°, -3°, 1°, 2°.
There are 7 temperatures in total. The median is the middle value in a sorted list. Since there are 7 values, the median is the fourth value.
The sorted list is:
- -11°
- -9°
- -9°
- -8° (this is the median)
- -3°
- 1°
- 2°
Thus, the median low temperature for the week is -8°.