Function a group of two numbers written in the form (x, y) where the x value represents a horizontal position and the y value represents a vertical position
2. input
a value generated by a function when an input value is substituted into the function and evaluated
3. mapping diagram
a table or diagram that represents a mathematical relation
4. ordered pair
a relation in which for any given input value, there is only one output value
5. output
a value that is substituted in for the variable in a function in order to generate an output value
6. relation
a set of ordered pairs
7. vertical line test
a test used to determine if a graph is a function; states that a vertical line can only go through one point on the graph to be a function