将(1,0.2),(2,0.4),(3,0.76)分别代入四个选项,通过求值比较即可选出答案.
【解析】
将(1,0.2),(2,0.4),(3,0.76)代入y=0.2x,当x=3时,y=0.6,和0.76相差较大;
将(1,0.2),(2,0.4),(3,0.76)代入,当x=3时,y=0.8,和0.76相差0.04;
将(1,0.2),(2,0.4),(3,0.76)代入,当x取1,2,3所得的y值都与已知值相差甚远;
将(1,0.2),(2,0.4),(3,0.76)代入y=0.2+log16x,当x=3时所得y值相差较大.
综合以上分析,选用函数关系较为近似.
故选B.