Lin is correct because just like a function, a snack machine takes an input (in this case, a code) and produces an output (a snack item). The input (code) is processed by the machine, which determines what snack corresponds to that code, and then dispenses that snack as the output. This process is similar to how a function takes an input, performs a specific operation on that input, and produces an output. Both the snack machine and a function have well-defined processes for determining their outputs based on specific inputs, making them comparable in this regard.
