Y=x的图像是一条直线,在第一第三 象限,如下图所示: y=x属于 一次函数。一次函数是函数中的一种,一般形如y=kx+b(k,b是常数,k≠0),其中x是 自变量,y是因变量。特别地,当b=0. 知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业.
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