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一次函数是初中数学的重要内容之一.它可以单独成题,但更多的是与方程(组)、不等式(组)以及几何图形等结合构成综合题.本文汇集一次函数的各种常见题型,以供同学们系统掌握这一方面的知识,沟通相关知识间的联系.一、求一次函数的解析式求一次函数y=kx+6(k≠0)的解析式,常用的方法是待定系数法.确定一次甬数解析式需要两个条件,如果能设法找到其图象经过的两个点,或者找到含有k,b的两个二元一次方程,便可通过解方程组求解.
The primary function is one of the important contents of junior high school mathematics. It can be a separate topic, but it is more often combined with equations (groups), inequalities (groups), and geometric figures to form a comprehensive problem. Type, for students to systematically grasp this knowledge, communicate the connection between related knowledge. First, find the analytical formula of a function to find a function y = kx + 6 (k ≠ 0) of the analytical formula, the commonly used method is The undetermined coefficient method. The determination of a first-pass number analytical formula requires two conditions. If one can find two points through which the image passes, or find two binary equations containing k, b, then solve the solution by solving the equations.