Even and odd functions are similar because they are both symmetrical. They are different because even functions are symmetric over the y-axis and odd functions are symmetric about the origin. If you want to check to see if a function is even, you plug in -x and if it comes out like the original it is even. If you want to check and see if a function is odd, you make the function negative and plug in x and if the negative function comes out, it's odd. Types of functions that are almost always even are quadratic, cosine, and absolute value. Types of functions that are almost always odd are identity, cubic, and sine. The question I have after doing this assignment is what if the function isn't even or odd?
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