PLZZZ I NEED HELP ON C IM ON A QUIZ The graph below shows a company's profit f(x), in dollars, depending on the price of pens x, in dollars, sold by the company
f(x)
150
120
90
60
30
х
2
3
7
8
-3 -2 -1
-30
Part A: What do the x-intercepts and maximum value of the graph represent? What are the intervals where the function is increasing and decreasi
they represent about the sale and profit? (4 points)
Part B: What is an approximate average rate of change of the graph from x = 3 to x = 5, and what does this rate represent? (3 points)
Part C: Describe the constraints of the domain. (3 points)

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d. what is the height of the tide after 93 hours?