线性回归是利用数理统计中回归分析，来确定两种或两种以上变量间相互依赖的定量关系的一种统计分析方法，运用十分广泛。其表达形式为y = w'x+e，e为误差服从均值为0的正态分布。(Linear regression is a statistical analysis method to determine the quantitative relationship between two or more variables and more than two variables by regression analysis in mathematical statistics, which is widely used. The expression is y = w'x+e and E is a normal distribution whose error obeys the mean value of 0.)