Part 1: Graphing
1. Label all parts of the graph. (Title, axis, etc.)
2. Based on the graph provided, use points on the line to determine the function for Part E.
3. Based on the graph provided, determine the function for Part F.
4. Graph parts A, B, C, D, G, H, and I on the graph paper.

Part 2: Analysis
5. How many seconds does the roller coaster last?

6. What is the roller coaster’s starting height? How many seconds does it take the roller coaster to reach maximum height?

7. Describe what the roller coaster is doing in the interval 7≤x<9.

8. Use your knowledge of function notation and piece wise functions to determine the following:
a. f(10)=
Explain what this value means in real world context.

b. f(20)=
Explain what this value means in real world context.

c. If 16 seconds have passed since the roller coaster started, what is the height of the roller coaster?

1. the manager of collins import autos believes the number of cars sold in a day (q) depends on two factors: (1) the number of hours the dealership is open (h) and (2) the number of salespersons working that day (s). after collecting data for two months (53 days), the manager estimates the following log-linear model: q 4 equation 1 a. explain, how to transform the log-linear model into linear form that can be estimated using multiple regression analysis. the computer output for the multiple regression analysis is shown below: q4 table b. how do you interpret coefficients b and c? if the dealership increases the number of salespersons by 20%, what will be the percentage increase in daily sales? c. test the overall model for statistical significance at the 5% significance level. d. what percent of the total variation in daily auto sales is explained by this equation? what could you suggest to increase this percentage? e. test the intercept for statistical significance at the 5% level of significance. if h and s both equal 0, are sales expected to be 0? explain why or why not? f. test the estimated coefficient b for statistical significance. if the dealership decreases its hours of operation by 10%, what is the expected impact on daily sales?