Strength of schedule is calculated from the opponents projected fantasy points allowed for the QB position. The best rating is +16 which gives the player the advantage against the defense and indicates an easy opponent, the worst rating is -16 which gives the defense the advantage and indicates a tough opponent.
Hill has been named the starter for week 1. Unfortunately it's for the 49ers. Top pick Crabtree is still a holdout and Singletary has shown he is going to be a run first team. Hill cannot be considered anything but backup material.