standard_description: Understand radian measure of an angle as the length of the arc on the unit circle subtended by the angle.
problem_activity: Task
California is in the fifth year of a drought. Towns have been asked to decrease water use across the state. The graph below shows the water storage in Lake Sonoma, a reservoir in Northern California from 1988, shortly after it was first filled, until February 1, 2015.
What questions do you have looking at the graph?
Describe some of the features of the graph.
What might explain these features?  (Consider data collection, weather events and reservoir management decisions.)
Based on the given information, should the region that depends on Lake Sonoma for water use implement additional water conservation measures?
[IMG]


aligns: no