Explain how to use the unit rate to make a table

to make a unit rate using a table you would take an input/output from a table and convert it into a fraction. Then you would take that fraction and simplify it. Sometimes you might have to choose a new input/output in order to make the simplification easier.

Example-

2:4

4:8

6:12

8:16

        Turn one into a fraction

4/8

       Simplify

1/2

I'm pretty sure it's answer 2 f(x)= - 2/3x -2 but if I'm wrong let me know :P