The graph and accompanying table shown here display 12 observations of a pair of variables (x, y).

The variables x and y are positively correlated, with a correlation coefficient of r = 0.98.

You estimate th slope of the least squares regression line, y = a + bx, for this data to be b = 1.9. What is the y-intercept, a, of the least squares regression line? Round your answer to the nearest tenth.

x 3 6 8 9 9 13 15 18 20 21 23 23
y 9 17 15 15 18 24 29 36 43 39 46 45

Question

The graph and accompanying table shown here display 12 observations of a pair of variables (x, y).

The variables x and y are positively correlated, with a correlation coefficient of r = 0.98.

You estimate th slope of the least squares regression line, y = a + bx, for this data to be b = 1.9. What is the y-intercept, a, of the least squares regression line? Round your answer to the nearest tenth.	

x 	3 	6 	8 	9 	9 	13 	15 	18 	20 	21 	23 	23
y 	9 	17 	15 	15 	18 	24 	29 	36 	43 	39 	46 	45