在直线相关分析中，r的绝对值越大

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【单选题】【消耗次数：1】

在直线相关分析中，r的绝对值越大

① 所绘散点越靠趋于一条直线

② 回归线对x轴越陡

③ 回归线在y轴上的截距越大

④ 回归线对x轴越平坦

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