Weekly Cars Sold versus Number of TV Ads 0 6 8 8 8 8 Number of Cars Sold 5 10 15 20 25 30 Number of TV ads x =14.5, y = 12.1, sx =8.71, sy =9.58, and r = 0.919 We can conclude there is linear correlation between the number of TV ads and the number of cars sold because the sample size n is and its corresponding critical value for the correlation coefficient is . Is the correlation positive or negative? Find the equation of the least-squares regression line: The slope is: Round to 2 decimal places. The y-intercept is . Round to 2 decimal places. The equation of the line is: Using the equation of the line we can predict that if the number of TV ads is 12 the number of cars sold will be . Round your final answer to the nearest whole number. The interpretation of the slope in the context of the problem is: The interpretation of the y-intercept in the context of the problem is: . If it is not appropriate to interpret the y-intercept an swer "Not appropriate". The percentage of variation on the number of cars sold that can be explained by the number of TV ads is %