The accompanying table shows a portion of data consisting of the selling price, the age. and the mileage for 20 used sedans. Price Age Miles
13,590 6 61,485
13,775 6 54,344
22,991 1 8,246
15,303 4 24,856
16,388 3 22,100
16,600 3 23,702
16,987 4 47,401
18,489 2 16,888
18,859 3 35,380
19,857 3 29,634
11,877 9 55,792
14,989 3 46,183
15,900 3 37,009
16,500 4 45,521
9,440 9 86,902
12,988 5 77,241
15,777 6 59,647
10,490 9 93,241
8,938 10 48,221
11,988 8 42,408

a. Determine the sample regression equation that enables us to predict the price of a sedan based on its age and mileage.
b. Interpret the slope coefficient of Age.

1 The slope coefficient of Age is -0.03, which suggests that for every additional year of age, the predicted price of a car decreases by $0.03.
2. The slope coefficient of Age is -1021.82, which suggests that for every additional year of age, the predicted price of a car decreases by $1021.82.
3. The slope coefficient of Age is-1021.82, which suggests that for every additional year of age, the predicted price of a car decreases by $1021.82, holding the number of miles constant.
4. The slope coefficient of Age is -0.03, which suggests that for every additional year of age, the predicted price of a car decreases by $0.03, holding the number of miles constant.

c. Predict the selling price of a five-year-old sedan with 65,000 miles.

Solve 17= -13 - 8x and show your work.

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.

In this problem, we explore the effect on the standard deviation of multiplying each data value in a data set by the same constant. consider the data set 14, 6, 8, 15, 15. (a) use the defining formula, the computation formula, or a calculator to compute s. (round your answer to one decimal place.) s = 4.28 (b) multiply each data value by 3 to obtain the new data set 42, 18, 24, 45, 45. compute s. (round your answer to one decimal place.) s = 12.83 (c) compare the results of parts (a) and (b). in general, how does the standard deviation change if each data value is multiplied by a constant c? multiplying each data value by the same constant c results in the standard deviation remaining the same. multiplying each data value by the same constant c results in the standard deviation being |c| times as large. multiplying each data value by the same constant c results in the standard deviation increasing by c units. multiplying each data value by the same constant c results in the standard deviation being |c| times smaller. (d) you recorded the weekly distances you bicycled in miles and computed the standard deviation to be s = 3.8 miles. your friend wants to know the standard deviation in kilometers. do you need to redo all the calculations? yes no given 1 mile ≠1.6 kilometers, what is the standard deviation in kilometers? (enter your answer to two decimal places.)