(Solved): The graph shows the depth of water \( W \) in a reservoir over a one-year period as a function of ...

The graph shows the depth of water \( W \) in a reservoir over a one-year period as a function of the number of days \( x \) since the beginning of the year. What was the average ate of change of \( W \) between \( x=100 \) and \( x=150 \) ? (Assume that the points lie on the grid lines.) \& ft/day