The expression $Y=f(x)$ is often used to describe the relationship between process inputs and the process output. Which description of $Y=f(x)$ is most accurate?

The output of a process $(x)$ is a function of the process inputs $(Y).$

More process inputs $(x)$ improve the function of the process output $(Y).$

Reducing the function of a process input $(x)$ will increase process output $(Y).$

More process inputs $(Y)$ improve the function of the process output $(x).$

The process output $(Y)$ is a function of the process inputs $(x)$