The scatterplot shows the relationship between the length of time , in hours, a certain bird spent in flight and the number of days after January 11, .
Which of the following statements best describes what a negative average rate of change in this scatterplot would indicate?
The bird's flight time remained constant over the period.
The bird's flight time increased over the period.
The bird's flight time decreased over the period.
The bird was not in flight during that period.
