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与一次函数有关的图象信息题,主要考查对数形结合思想的理解、掌握与运用,以及根据图象获取解题信息的能力.解这类题的关键在于读懂一次函数图象和实际情境中的数量关系,要善于将图象信息与实际数据转化为相应的数学问题.下面举例说明: 例1 如图表示一骑自行车者和一骑摩托车者沿相同路由甲地到乙地行驶过程的函数图象(分别为正比例函数和一次函数).两地间的距离是80千米,请你根据图象回答或解决下面的问题.
The image information questions related to primary functions mainly examine the understanding, mastery, and use of the logarithmic-combined ideas, and the ability to obtain problem-solving information from images. The key to solving such questions is to read the function image and the actual function. The quantitative relationship in context should be good at translating image information and actual data into corresponding mathematical problems. Here is an example to illustrate: Example 1 shows a cyclist and a motorcyclist traveling along the same route from A to B. Process function image (respectively proportional function and first function). The distance between the two places is 80 kilometers. Please answer or solve the following problem according to the image.