For our final unit of precalculus 12, we learned about conics. We were taught the graphs and how they work as well as what variables change the graph whether it be by translations or expansions/compressions. The reason why I chose the functions that I did was that I found an ellipse to be very useful in portraying the image of an eye, a pupil, and the iris. I found that hyperbolas were useful for making the nose and I used those for the bottom of the nose. Radical functions were very good for hair as they had a slight curve to them which my hair has in the picture I chose. Straight-line graphs were good for any portion that were straight or had a sharp curve so I used them a lot. Parabolas were also very useful, with the right compressions I could use them to make my hat as my hat is slightly curved. I also used a parabola on the lower part of my face because it matched almost perfectly when lining it up due to my oval-shaped head. A way I went above and beyond was I added custom colours to everything as well as shaded the lips in.
P.S: You may need to zoom in on the lips because I think the shading made it kind of buggy and the top lips disappear when zoomed out.