Construct and Interpret Linear Functions Practice Test

The temperature of a cup of soup decreases at a steady rate. The temperature is $160^\circ\text{F}$ at time $t=0$ minutes and $148^\circ\text{F}$ at time $t=4$ minutes.

Which function models the temperature $T$ (in $^\circ\text{F}$) as a function of time $t$ (minutes), and what do $m$ and $b$ represent?

A science lab cools a liquid. The temperature is 80°C at time 0 minutes and 68°C at time 4 minutes. Let $t$ be time (minutes) and let $T$ be temperature (°C).

Which linear function models the temperature, and how should you interpret the slope and intercept?