19-y because you are taking away y from 19
If you pick only positive numbers, the absolute value will have no effect, and the original set and the set of the absolute value will be exactly the same:

is still

Answer:
8
Step-by-step explanation:
It has the highest frequency
Answer:
C ( 1,-2)
Step-by-step explanation:
We can plot the points and see what point is not in the shaded section