做衣服销售量Y件,售价X元关系如下,售价X为50.51.52.53.销售量Y为500.490.480
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![做衣服销售量Y件,售价X元关系如下,售价X为50.51.52.53.销售量Y为500.490.480](/uploads/image/z/3992959-55-9.jpg?t=%E5%81%9A%E8%A1%A3%E6%9C%8D%E9%94%80%E5%94%AE%E9%87%8FY%E4%BB%B6%2C%E5%94%AE%E4%BB%B7X%E5%85%83%E5%85%B3%E7%B3%BB%E5%A6%82%E4%B8%8B%2C%E5%94%AE%E4%BB%B7X%E4%B8%BA50.51.52.53.%E9%94%80%E5%94%AE%E9%87%8FY%E4%B8%BA500.490.480)
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做衣服销售量Y件,售价X元关系如下,售价X为50.51.52.53.销售量Y为500.490.480
做衣服销售量Y件,售价X元关系如下,售价X为50.51.52.53.销售量Y为500.490.480
做衣服销售量Y件,售价X元关系如下,售价X为50.51.52.53.销售量Y为500.490.480
是要求X和Y的关系表达式吗?
由题知,X.Y存在线性关系,设Y=aX+b
将两组(x.y)代入,得:
Y=-10X+1000
45<=x<=60
销量Q=XY=x(-10x+1000)=-10x^2+1000x=-10(x-50)^2+25000
当x=50是,Q取得最大值=25000