There are 4 quadrants and each quadrant is has a measure of 90° angle.
Because the direction is positive, it means that the arm is going from 1st quadrant to 2nd quadrant.
90° + 90° = 180°
Because there is an additional rotation of 25°, the arm is now in the 3rd quadrant.
180° + 25° = 205°
The measure of the angle is 205°
Looking through the table, the rainfall (in inches) goes down by 00.53 inches.
Therefore, you could say that,
"The average rate of change is 00.53. This means that each year the amount of rainfall in inches goes down by 00.53."
Two hours earlier than the appointment start time, so he should get up at 6:45am, at latest.