Case Study: Mosquito Eradication Program (Part 8)

Comparing all three graphs, what correlations do you see?

Three stacked graphs with the same x-axis, labeled Year and ranges from 1986 to 1998 in increments of 1 year. The top graph is titled Percent of houses covered, the middle graph is titled Percent of houses infested, and the bottom graph is titled Cases of dengue, double as the y-axes. Mosquito interventions are shown in 1986, 1987 to 1990, 1990 to 1993, 1994 to 1995, 1996, and 1997 to 1998. Mosquito infestations are shown in 1986 to 1988, 1989 to 1991, 1992 to 1994, and 1996 to 1998. Outbreaks are shown in 1986 to 1987, 1989 to 1991, an off-the-graph outbreak in 1994, and an outbreak in 1997 to 1998.
Percentage of houses covered by mosquito interventions vs. percentage of houses infested with mosquitoes vs. cases of dengue in Fortaleza from 1986 to 1998