Self-Portrait
Explanation
I began this project with a plan by tracing over a picture and colour-coding it accordingly.
To select the appropriate functions, I traced my face using sharp lines, simple shapes, and incorporated as many unique functions as possible, such as trigonometric functions for the lips and beard.
Light blue represents both circles and ellipses, red represents both linear functions and absolute values, green for quadratic functions, pink for exponential functions, yellow for sine functions, and orange for hyperbolic functions.
Since I made the halves symmetrical over the y-axis, I was able to use an absolute value for most of the red lines and set a restriction to cut the top and bottom. Although most of my circles and ellipses were used on the hair, I used most of the ellipses for shading, mostly noticeable on the chin and nose. I also used a hyperbola for shading next to the nose.
I used inequalities to colour in the graphs. To achieve various shades of brown, which were not available in the default color set, I created custom colors using RGB functions.
Here is the link for the graph -> https://www.desmos.com/calculator/kpimvvmbxu