Answer
See the image below.
Work Step by Step
For a rough sketching, we can simply draw the similar figure we have on the first quadrant to the third quadrant; the way that it will be symmetrical with respect to the origin. (See the image above)
For a more precise sketching, we can take negative values of $x$ and find several points on the third quadrant. Plot these points and connect them according to the form we have on the first quadrant.
