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用待定系数法确定一次函数y=kx+b的解析式的一般步骤是:一代:将从已知条件中得到的x、y的对应值代入y=kx+b中,建立关于k、b的二元一次方程组;二解:解关于k、b的二元一次方程组;三代:将所求出的k、b的值代入y=kx+b中;四答:得出一次函数的解析式.下面举例谈谈用待定系数法求一次函数解析式的常见类型,供同学
The general procedure for determining the analytic function of the first-order function y=kx+b using the undetermined coefficient method is: Generation: Substitute the corresponding values of x and y obtained from the known conditions into y=kx+b to establish the relation between k and b. Binary system of first order equations; Second solution: Solution of binary equations for k, b; Three generations: Substituting the values of k and b obtained in y=kx+b; Four answers: Obtaining a function analysis The following example talks about the common types of analytical equations for the first-order function using the undetermined coefficient method.