A magazine publishes restaurant ratings for various locations around the world. The magazine rates the restaurants for food, decor, service, and the cost per person. Develop a regression model to predict the cost per person, based on a variable that represents the sum of the three ratings. The magazine has compiled the accompanying table of this summated ratings variable and the cost per person for 25 restaurants in a major city. Complete parts (a) through (e) below. E Click the lcon to view the table of summated ratings and cost per person. a. Construct a scatter plot. Choose the correct graph below. OA. OB. Oc. OD. ACost d 90 A Cost () ACost () 904 ACost ) 90 90 Rating Rating Rating Ratng Summated ratings and cost per person b. Assuming a linear relationship, use the least-squares method to compute the regression coefficients bo and b. bo -Oand b, -O (Round to two decimal places as needed.) Summated Rating Cost ($ per person) 53 67 67 c. Interpret the meaning of the Y-intercept, bo, and the slope, b,. Choose the correct answer below. 37 52 O A. The Y-intercept, bg. implies that if the summated rating of a restaurant is zero, the cost per person is bo, in dollars. The slope, b, implies the average cost per person is b; dollars. 61 OB. The Yintercept, bg, implies that if the summated rating of a restaurant is zero, the cost per meal is equal to bo, in dollars. The slope, b,, implies that for each increase of 1dollar in the cost per person, the summated rating is expected to increase by b, 66 58 66 45 OC. The Y-intercept, bg. implies that if the summated rating of a restaurant is zero, the cost per meal is equal to bo, in dollars. The slope, b,, implies that for each increase of 1 in the summated rating, the cost per person is expected to decrease by by, in dollars. 58 39 OD. Apractical interpretation of the Y-intercept bo is not meaningful because no operating restaurant is likely to have a rating of zero. The slope b, implies that for each increase of 1 in the summated rating, the cost per person is expected to increase by the value of 55 44 61 44 54 51 33 d. Predict the mean cost per person for a restaurant with a summated rating of 50. 35 50 41 Y, -$ per person (Round to the nearest cent as needed.) 50 77 37 83 e. What should you tell the owner of a group of restaurants in this geographical area about the relationship between the summated rating and the cost of a meal? 64 54 52 38 O A. As expected, the lower the summated rating of the restaurant, the higher the restaurant can charge per meal. OB. As expected, the higher the summated rating of the restaurant, the higher the restaurant can charge per meal. OC. As expected, the higher the summated rating of the restaurant, the less the restaurant can charge per meal. OD. As expected, the summated rating of the restaurant is not associated with what the restaurant can charge per meal. 48 37 55 48 31 23 55 43 58 45 63 64 63 63 51 28 74 45

C and D

4 seconds after the stone is dropped

Let AABC be a triangle. Fix the points X, Y, and Z on AB, AC, and BC, respectively (as in the figure) such that BX = - = CZ AY = 4. Assume that the area of AXYZ is one and calculate the area of AABC. ХА YC ZB

OD. -10 10