I think you are asking for chaptr 6 if yes then here is your answer

At first to find out the shaded region we have to find the points on the graph .

After finding the graph plot the points on the graph and make a stright line joining them .

Now , if it is greater than 0 then it should be shaded away from the origin and if it is less than 0 then it should be near to the origin .

Here is a simple example of it ??

Hope it will be helpful