The population of tiger sharks off the coast of florida was recorded over several months. graph the tiger shark populations below.

january - 12 sharks february - 15 sharks march - 25 sharks
april - 35 sharks

may – 34 sharks
june – 44 sharks
july – 49 sharks
august - 55 sharks
september – 72 sharks
october – 85 sharks
november – 98 sharks
december - 105 sharks

the number of nurse sharks was also recorded for this time period, though the person recorded the number was not as reliable as the person recording tiger shark numbers. the following data was taken on nurse sharks.

march - 60 april - 52 july - 38 august – 20 november- 14

use a different color to graph the nurse shark population on the graph above

a. at what month would you expect the number of nurse sharks to equal the number of tiger sharks?

b. what does the graph tell you about the trends both shark populations?