f(x)=5 * X



x                  f(x)               

-10                -50                

-9                 -45                

-8                 -40                

-7                 -35                

-6                 -30                

-5                 -25                

-4                 -20                

-3                 -15                

-2                 -10                

-1                 -5                 

0                  0                  

1                  5                  

2                  10                 

3                  15                 

4                  20                 

5                  25                 

6                  30                 

7                  35                 

8                  40                 

9                  45                 

10                 50