I used a mixture of several functions including constant functions, quadratic functions, and Cosine functions. What I did to the smiley face was first put a beard by simply using a quadratic function. I also made a hat by having a constant function and another quadratic function. I added glasses by using constant functions and 2 quadratic functions together. I added hair with the quadratic function as well. Lastly I added a mustache and uni brow with a cosine function. What I found challenging was trying to make the lines stop at where you wanted to them. I learned how to use negative numbers and fractions to effect the function differently.
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