AMC8 1994

AMC8 1994 · Q18

AMC8 1994 · Q18. It mainly tests Graphs (coordinate plane).

Mike leaves home and drives slowly east through city traffic. When he reaches the highway he drives east more rapidly until he reaches the shopping mall where he stops. He shops at the mall for an hour. Mike returns home by the same route as he came, driving west rapidly along the highway and then slowly through city traffic. Each graph shows the distance from home on the vertical axis versus the time elapsed since leaving home on the horizontal axis. Which graph is the best representation of Mike's trip?

Mike离开家，慢慢向东穿过城市交通。到达高速公路后，他更快地向东开到购物中心，然后停下。他在商场购物1小时。Mike返回家时走同一条路，先快速向西沿高速公路行驶，然后慢慢穿过城市交通。每个图表纵轴表示离家的距离，横轴表示离开家后的经过时间。哪张图是Mike旅程的最佳表示？

(A)