Jesse wants to write a function to represent the graph. he says that the period of the graph is triple that of sin x and that the equation of the graph is f(x)=3sin x. why is he incorrect? a. the period of the graph is twice that of sin x. b. the frequency of the graph is triple that of sin x. c. the equation of the graph should be f(x)=sin x/3. d. the equation of the graph should be f(x)=3sin x.