6. An angler hooks a trout and reels in his line at Sin/sec. Assume the tip of the fishing rod is 13 ft above the water and directly above the angler, and the
Decreasing
fish is pulled horizontally directly toward the angler (see
at 5 in./s
figure). Find the horizontal speed of the fish when it is
21 ft from the angler. You need to define any variable 13 ft
you use in the context of the problem.
7. Find the point P on the line y=5x that is closest to the
point (78, 0). Include a picture and define any variable you use.

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?