Question

at work, brett must check and record the internal temperature of the freezer on an hourly basis. when working properly, the temperature should remain constant over time. what word describes the slope of a line showing the temperature of the freezer as a function of time in hours when the freezer is working properly? zero negative undefined positive

Explanation:

The slope of a line in a temperature - time graph represents the rate of change of temperature with respect to time. When the temperature remains constant over time, there is no change in temperature as time passes. The formula for slope $m=\frac{\Delta y}{\Delta x}$, where $\Delta y$ is the change in the dependent variable (temperature) and $\Delta x$ is the change in the independent variable (time). Since $\Delta y = 0$ (constant temperature), the slope $m = 0$.

Answer:

A. zero