What is the value of the Y-intercept of the least-squares regression line from this data? Round you answer to at least two decimal places. I add all the y up's and came up with 2714.4. Then is says the least-squares regression line for these data has a slope of approximately 0.56. the x data comes up 2686. Then what is the sample correlation coefficient for these data? Have no idea how to even start. Pleae help me if you can