Power function
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In mathematics, a power function is a function of the form : where and are constant real numbers and is a variable. The domain of a power function can sometimes be all real numbers, but generally a non-negativity is used to avoid problems with simplifying. The domain of definition is determined by each individual case.
Power functions are a special case of power law relationships, which appear throughout mathematics and statistics.
An equation in the form f(x)=ax^b where and b are nonzero real numbers.