A:Frank's father was hardworking and very responsible.
B:Frank's father drove him to school everyday when he was 12.
C:Frank regretted refusing his father's kiss very much.
D:Frank didn't think the good-bye kiss an embarrassment anymore.
读经纬网图,回答问题.
已知反比例函数y=(m﹣1)xm2-m-3,当x<0时,y随x的增大而减小,求反比例函数的表达式.