Answer:
Here is a complete function table for f(x) = -x-7:
x f(x)
-6 1
-5 2
-4 3
-3 4
-2 5
-1 6
0 7
1 8
2 9
3 10
4 11
5 12
6 13
You can see as x increases by 1, the output of the function f(x) increase by 1 as well, it starts from -13 to -6.
Uday Tahlan