Elevation and temperature data for a place are tabulated below:

$$\begin{array}{|c|c|} \hline \text{Elevation, m} & \text{Temperature, } ^{\circ}C \\ \hline 4 & 21.25 \\ \hline 444 & 15.70 \\ \hline \end{array}$$

Based on the above data, lapse rate can be referred as