某一次函数的图象经过点（-1，0）且函数y的值随x的增大而减小，写出一个符合这个条件的函数解析式
Y=-x-1
由题可知，要求的解析式只需满足条件k＜0且过点（-1，0）即可．
解：∵函数值随着自变量的增大而减小，
∴x的系数小于0，可定为-1，
∴函数解析式可表示为：y=-x+b，把（-1，0）代入得，b=-1，
∴要求的函数解析式为：y=-x-1．（答案不唯一）
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