一次函数图象直观地反映了两个变量之间的变化关系,一次函数图象的应用非常广泛,下面以部分中考试题为例说明一次函数图象在现实生活中的应用.一、行程类例1甲、乙两人在直线跑道上同起点、同终点、同方向匀速跑步500m,先到终点的人原地休息.已知甲先出发2s.在跑步过程中,甲、乙两人的距离y(m)与乙出发的时间t(s)之间的关系如图 First-order function of the image intuitively reflects the relationship between the two variables, a function of the image is widely used, the following part of the test questions as an example of a function of the image in real life applications. 1 A, B two straight on the same starting point with the runway, with the end, running in the same direction uniform speed 500m, first to the end of the people in situ rest. Known A first departure 2s. In the running process, A, B two distance The relationship between y (m) and B’s departure time t (s) is shown in the figure