如果y=kx（k≠0）的自变量增加4,函数值相应地减少16,则k值等于多少?怎么算的?
如果y=kx（k≠0）的自变量增加4,函数值相应地减少16,则k值等于多少?怎么算的?
数学人气：307 ℃时间：2020-05-21 07:14:31
优质解答
根据题意,得,y-16=k(x+4),又因为y=kx,所以,kx-16=kx+4k,4k=-16,所以,k=-4
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