2π x+50 can be used to model
2. Astronomers noticed that the number of visible sunspots varies from a minimum of about 20 sunspots to a maximum of about 80 sunspots
per year. They noticed that this variation repeats over a certain period of years. The function V(x) = 30 cos
the number of visible sunspots, V(x), in terms of x, the number of years since 2014, the year of the last maximum. A graph of this function is
shown from year 2002 through 2015
11
-12-11-10-9-8-7-6-5
727/1-10-
-3-2-1 0
Number of years since 2014
-10
-70
-воту
Visible sunspots.
50
40
30
20
10