1.设y甲=k1X+b1,y乙=k2 X+b2 (1和2指字母底下的数字){b1=4 {b2=2{6k 1+b=0 {6k 2+b2=4解得k1=-2/3 b1=4 k2=1/3 b2=2甲:-2/3X+4 乙:1/3X+2X取值范围是0<=x<=62.由-2/3X+4=1/3X+2得X=2所以当水流动两小时深度相同
图呢