AP Statistics 1.5: Quantitative One-Variable Graphs

Tropical storms in the Pacific Ocean with sustained winds that exceed 74 miles per hour are called typhoons. Graph A below displays the number of recorded typhoons in two regions of the Pacific Ocean-the Eastern Pacific and the Western Pacific-for the years from 1997 to 2010.

Graph B below shows both yearly frequencies (connected by dashed lines) and the respective 4-year moving averages (connected by solid lines). Use your answer in part (c) to complete the graph.