Linear regression analysis is a part of the requirements of the mathematics teaching syllabus of 20 1 1 college entrance examination in Hubei province. For science students, it is only necessary to understand and use it, while for arts students, even if the college entrance examination is to examine the mastery of linear regression by literature and history candidates, the proposer will provide relevant calculation formulas at the beginning of the volume. Linear regression equation is a quantitative reflection of the linear correlation degree of experimental data. The regression straight line always exceeds the expected level of variables, that is, (x-pull, y-pull), and the regression straight line equation is: y = b * x+a. Science students need to memorize the formulas for determining the coefficients b and a, and liberal arts students need to be able to use them, so it is best to remember them. I hope it works for you. Come on ~