已知角α的顶点与原点重合，始边与x轴的正半轴重合，终边经过点P（﹣3，m），且sinα=﹣$\frac{4}{5}$，则tanα等于（　　）

翻译句子。

    I'm an Chinese girl. My name is Rose. I have a brother. His name is Tom. Tom and I are in the same school. I often go to school by bike. Tom usually⑴w__________ to school. We both(两个都) have lunch at school and we like Chinese food very much. After school， Tom always plays basketball with his classmates. ②I always speak Chinese because I like Chinese best. I go home at about five o'clock in the afternoon. But Tom goes home late， at about a quarter past seven. My parents are both teachers. They teach for many years in Beijing. We like China very much.