E Find all values of x such fx 600 What do these values rep

2. Solve the following system of equations using your favorite algebraic method. -x+6y-6 2x=9y-11 3. The following graph y -f(x) represents the number of people in line for the roller coaster at the Number of People in Line for the Roller Coaster 1000 800 600 400 200 Hours after 8 am What are the domain and range of the function as pictured above? a. b. According to the graph, how many people were in line at 8 am? /50 peapla Find s(4) and describe what it represents. c. n ine or or d. Find all values of x such that f(x)-200. What do these values represent? e. Find all values of x such that(x) 600. What do these values represent? 36

Solution

Ans)

D) f (x) curve cut the point 200 at 3 points. This means that the number of people in line for the roller coaster will be be 200 immediately after 8 AM, at about 1 PM and again after 2 PM.

E) f (x) curve cut the point 600 at 2 points. This means that the number of people in line for the roller coaster will be be above 600 after approximately 8:45 AM, and this will continue till almost 11:15 AM.