How would adding 0 affect the mean and median

The 0 would most likely effect the mean the most. This is because the mean accounts for value of the numbers. But the median, however, just depends on how much of the numbers there are. Although both will decrease, the mean will increase the most. The median will just go down slightly. While the mean will take tremendous damage.

Apologies if it's wrong and have a good day!~

look a the sides they are perpendicular