Answer:
Both have a vertical shift of 5 units but in different directions.
Both functions are non-linear.
Step-by-step explanation:
Given : Functions
and 
To find : What do both of these functions have in common?
Solution :
Functions
and
both are different functions .
The common in these functions is
Both have a vertical shift of 5 units but in different directions.
Vertical shift is 
If there is +b then vertically upward
If there is -b then vertically downward.
and both functions are non-linear.