Which of the following statements best describes the reason Y = f(x) is important for improvement projects?

[answerhappygod]

By measuring aspects of the inputs and the process, it is possible to discover the key contributors that are negatively impacting the project Y
The output of an improvement project is equal to the effort a team puts into measuring the X and Y variables
A process improvement team can increase the input measure X, by improving the output measure Y
The Xs are dependent variables and their performance is determined by the independent Y variable