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学习一次函数后,我觉得学会看函数图像是非常重要的,而这种“看”并不是简单地读文字、符号或图像,而是要深刻理解图像或条件,请看一道考题:例1(2009·江苏中考题)某加油站五月份营销一种油品的销售利润y(万元)与销售量x(万升)之间函数关系的图像如图中折线所示,该加油站截止到13日调价时的销售利润为4万元,截止到15日进油时的销售利润为5.5万元.(销售利润=(售
After learning a function, I think it is very important to learn to see the function image, and this “look ” is not simply to read the text, symbols or images, but to understand the image or the conditions, see a test: Example 1 (2009 · Jiangsu senior high school entrance examination questions) a gas station marketing in May sales of an oil product profit y (million) and sales x (million liters) image of the functional relationship shown in the broken line, the gas station As of the 13th when the price adjustment sales profit 40,000 yuan, as of the 15th into the oil when the sales profit of 55,000 yuan. (Sales profit = (for sale