4. Mikaela has collected a few factors which can influence the daily sales of pies. These factors are: number of advertisements placed on the local TV channel, average temperature of the day, and price of the local barbecue sauce. The values that she has collected for these factors together with the daily sales for the last 10 days are presented in the following table. Suppose she is interested in whether or not sales daily depend upon the average temperature of the day. What variable should be independent and what should be the dependent variable? Why?

Day	Daily sales ($)	Number of ads	Temperature (o C)	Price of barbecue Sauce ($)
1	240.80	2	30	1.90
2	308.40	3	31.2	1.92
3	290.50	4	25.9	1.94
4	288.30	2	27.0	1.81
5	312.70	1	24.6	1.85
6	198.50	5	28.5	1.86
7	210.20	6	22.8	1.95
8	256.70	2	23.5	2.00
9	222.10	3	28.6	1.50
10	270.30	4	33.4	1.89

5. Draw a scatter diagram with the dependent and independent variable.

6.Find the correlation coefficient. What does the correlation coefficient indicate about the significance of the relationship?

7.Does a line seem to be the best way to fit the data? Why or why not?