Do you know? A function is a special kind of relation. Relations pair up x and y coordinates, either by listing them (explicitly) or by writing an equation (implicitly). Functions have the additional property that no two values of y have the same value of x. Put another way, if you view x as the input and y as the output, functions have the property that each input yields only one output. If you ever see the situation where a single input has two different outputs, that is not a function.
Posted on: Thu, 25 Jul 2013 17:33:41 +0000