The temperature of the soil is $28 \ {}^{\circ}\mathrm{C}$ at the surface and decreases by $0.02 \ {}^{\circ}\mathrm{C}$ for each centimeter below the surface. Express temperature $T$, in degrees Celsius, as a function of depth $d$, in centimeters, below the surface. Enter your answer as an equation with $T$ on the left side, and an expression involving $d$ on the right.

help (equations)