A logistics analyst is using the equation ${}4x + y = -3$ to model the relationship between shipments ($x$) and a cost adjustment factor ($y$). To confirm if the factor $y$ is a function of the shipments $x$, the analyst solves the equation for $y$. Which of the following equations represents the correct resulting form?

A quality control engineer uses the linear equation ${}4x + y = -3$ to monitor the relationship between production speed ($x$) and a variance factor ($y$). To determine if $y$ is a function of $x$, the engineer rewrites the equation as $y = -4x - 3$. This equation defines a function because for every unique value substituted for $x$, there is exactly ____ corresponding value for $y$.

A payroll specialist uses the equation ${}4x + y = -3$ to calculate a specific benefit deduction ($y$) based on an employee's total hours worked ($x$). True or False: This equation defines $y$ as a function of $x$ because for every value substituted for $x$, there is exactly one corresponding value for $y$.

A facilities manager uses the equation ${}4x + y = -3$ to model the relationship between a building's maintenance hours ($x$) and a utility efficiency rating ($y$). Arrange the following steps in the correct order to prove that this equation defines the efficiency rating $y$ as a function of the maintenance hours $x$.

Determining if a Linear Equation is a Function