Match the vocabulary words with the right definitions. 1. a relation where for any given input value there is only one output value function 2. a group of two numbers written in an order (x, y) so that the first value represents a horizontal position and the second number represents a vertical position domain 3. the independent values, or x values ordered pair 4. a way of representing how the members of one group are related to the members of another group mapping diagram 5. a value substituted in for the variable in a function which generates another value (the output) input