Algebra 2 vocab 1. a function where each y-value is uniquely matched with an x-value is called? 2. what is it called when each x-value has at most one y-value? 3. A function that is sort of a 'Frankenstein of pieces of other functions put together is called...? 4. a one-one function where the inputs on one function are the outputs of the other function is called..? 5. what is the line over which inverse functions are reflected called?