I'm not sure what is this question asking about.

The temperature at a point(x, y) is T(x,y), measured in degrees

Celsius, A bug crawls so that its position after t seconds is given

by $\displaystyle x=\sqrt{1+t}, y=2+\frac{t}{3}$, where x and y are measured in centimeters. The temperature function satisfies Tx(2,3) = 4 and Ty(2,3)=3. How fast is the temperature rising on the bug’s path

after 3 seconds?

How can I begin with this?

Thank you.