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人教版九年义务教育课标教材《数学》八年级下册,在第十七章介绍了反比例函数。通过学习我们知道,能够写出实际问题中具有反比例关系的函数解析式,是本章的学习重点之一。这是因为,在现实生活中,存在着大量的反比例关系。能够举例并把它们表示成反比例函数,是解决实际问题的一个关键(在课本中,给出了丰富的例证)。另一方面,在直角坐标系中,用描点法画出反比例函数的图象,也是本章的一个学习重点。通过图象,可以进一步探索反比例函
People’s Education Edition Nine-year compulsory education textbook “Mathematics” eighth grade, in the seventeenth chapter introduces the inverse proportion function. By learning, we know that being able to write function-analytic equations that have inverse relationships in real problems is one of the focuses of this chapter. This is because, in real life, there is a great deal of inverse proportionality. Being able to give examples and represent them as inversely proportional functions is a key to solving practical problems (in the textbook, a wealth of examples are given). On the other hand, drawing a graph of inverse-proportion functions in Cartesian coordinates is also a point of study in this chapter. Through the image, you can further explore the inverse proportion letter