英语翻译
On the number line,point P has coordinate 1/2,and point Q has coordinate 2.If point R is 1/4 of the way from P to Q,what is the coordinate of 我不知道what is the coordinate of R这句是什么意思我认为R是3/8但没有这个选项 .不清楚为什么要加P的坐标.