# SOLUTION: What is a function?

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 Click here to see ALL problems on test Question 620669: What is a function?Answer by math-vortex(472)   (Show Source): You can put this solution on YOUR website!Hi, there-- . In mathematics, a function is a relation between a set of inputs called the domain and a set of outputs called the range with the property that each input is related to exactly one output. . One example of a function is defined by the rule f(x) = x^2, which relates an input x to the square of x. The domain of this function is the set of real numbers. The range is the set of non-negative real numbers. . Notice that no matter that number you choose from the domain, it is related to only one number in the range. For example 2-squared is four. There is no other answer. . In functions it may be the case that more than one number in the domain is related to a single number in the rangle (e.g. 3-squared is nine, and negative 3-squared is also nine.) This is OK, just not the other way around. . Hope this helps! . Ms.Figgy math.in.the.vortex@gmail.com