The document is a student's work showing the steps to find the derivative dy/dt given the equation y=3x+5 and that dx/dt=2. It first takes the derivative of y to get dy/dt=3(dx/dt). It then plugs in the value of 2 for dx/dt to get dy/dt=6. It then repeats the process for a second part where dx/dt is given as -1/3.