A quality control technician is monitoring the calibration of a sensor. The sensor's accuracy is drifting downward at a rate of 1 unit per month (slope $m = -1$). At the start of the monitoring period, the sensor is already 3 units below the standard calibration point (represented by a $y$-intercept of $(0, -3)$). Which linear equation correctly models this calibration drift $y$ over $x$ months in slope-intercept form?

A property manager is tracking the value of an appliance that depreciates at a constant rate. The value decreases by 1 unit per year (slope $m = -1$) and started with an initial valuation adjustment of -3 units ($y$-intercept (0, -3)). Arrange the following steps in the correct order to determine the simplified linear equation in slope-intercept form.

An environmental safety officer is monitoring a containment pit where the water level is currently 3 meters below the safety line (represented by the $y$-intercept $(0, -3)$). The level is dropping at a rate of 1 meter per hour (slope $m = -1$). Match each component of the linear model for this situation with its correct numerical value or simplified expression.

Production Line Efficiency Analysis

A logistics coordinator is tracking a supply chain deficit. The deficit is growing at a constant rate of 1 unit per day, but to model this as a reduction in available stock, the slope is defined as $m = -1$. The initial state is already 3 units below the target safety stock, which is represented by the $y$-intercept $(0, -3)$. In the slope-intercept form $y = mx + b$, the simplified equation that models this inventory level $y$ after $x$ days is $y =$ ____.