The relationship between power and time would be an inverse one. The relationship between power and force would be a direct one as per the equation P = Fd/t. Knowing this we can solve for speed as s = d/t. P = Fv, here we can see that there is a direct relationship between power and speed. Finally since F•d is another way to define work, the equation becomes. P = W/t. This would also be a direct relationship between power and work.