Okay, I did. Now what? Do the problem for you? That wouldn't help either of us. Do you know what a "law or proprotionality" is? Tell us what you know about "laws or proportionality" and we can go from there.
The law of proportionality is when a statement is given as a formula, then the formula is called the law of proportionality or the law of variation. I have spent some time trying to work through this problem and don't seem to have got far.