To find the median low temperature, we first need to arrange the temperatures in ascending order. The low temperatures given are:
2°, −3°, −9°, −11°, 1°, −8°, and −9°.
Arranging these in ascending order:
-11°, -9°, -9°, -8°, -3°, 1°, 2°.
Now, we have 7 temperatures in total. The median is the middle number in an ordered list. Since we have an odd number of temperatures (7), the median will be the 4th temperature in this ordered list.
The ordered temperatures are:
- -11°
- -9°
- -9°
- -8° (this is the median)
- -3°
- 1°
- 2°
Thus, the median low temperature for the week is -8°.