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1.根据图像求解例1某出租车公司收费标准如图1所示,如果小明乘出租车最远能到达13千米处,那么他最多只有元钱。解析:此题考查一次函数解析式的求法及已知自变量求函数值。用待定系数法求解,设一次函数解析式y=kx+b,然后把x、y的两组值代入,得到两个二元一次方程,解方程组可得k、b的值,可求出一次函数解析式。此题两组值为x=3,y=4;x=8,y=10,分别代入y=kx+b中,求得k=1.2,b=0.4,即一次函数解析式y=1.2x+0.4。当x=13时,y=16。所以答案为16元钱。2.根据创设的情景
1. According to the image solution example 1 a taxi company charges as shown in Figure 1, if Xiaoming taxi can reach as far as 13 km, then he has only a maximum of money. Analysis: This question examines a function analytic method and known arguments seeking function value. Use the undetermined coefficient method to solve, set a function analysis y = kx + b, and then the two groups of x, y values into, get two binary linear equations, equations can be obtained k, b values can be obtained A function analytic. The two groups of values of this question are x = 3 and y = 4; x = 8 and y = 10, respectively substituted into y = kx + b to obtain k = 1.2 and b = 0.4, +0.4. When x = 13, y = 16. So the answer is 16 yuan. According to the creation of the scene