统计案例的很多问题中都引入数学思想的光彩.等价转化思想中可线性化的回归分析问题,画出已知数据的散点图,选择跟散点图拟合比较好的函数模型,通过变量代换转化为新的线性回归方程,再回到非线性回归方程,注意将中间变量值用x代换.数形结合思想中,求回归方程前先判断两个变量之间能否具有线性相关性.一、等价转化思想 Many cases of statistical cases have introduced the gloriousness of mathematical ideas.It can be linearized regression analysis of equivalent transformation idea, draw the scatter plot of known data, select a better fit with the scatterplot function model, through Variable substitution into a new linear regression equation, and then back to the nonlinear regression equation, pay attention to the intermediate variable value replaced by x. Combination of digital form, before regression equation to determine whether there is a linear between the two variables Relevance. First, the equivalent conversion thought