Here are some examples that commonly appear in engineering.
Cubic function: The volume of similar objects (for example two cubes, two spheres, two cylinders with the same length-to-diameter ratio, etc.) is proportional to the cube of their diameter. For example, if you increase the diameter of a sphere by a factor "x", then its volume will increase by a factor "x cubed".
Reciprocal: There are many situations where one variable is inversely proportional to another - if one increases, the other decreases - the second variable is equal to some constant, times the reciprocal function. For example, this is the case with the relationship between pressure and volume in the ideal gas law - as well as the relationship between some other variables in the ideal gas law.
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A real life example for the absolute value function is a football field. Even though the center of the field is labeled zero, you wouldn't say you ran negative feet if you went backwards..
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we can find symmetary in our daily life in designs of a fashion designer or a normal tailor when he stitches our dresses