已知收入和消费支出(单位:千元)的统计资料及相关计算结果如下表: 要求:(1)绘制散点图；(2)计算收入与消费支出之间的相关系数，说明相关方向与程度；(3)若估计的回归方程为:＝-0.18+0.44x，说明回归系数0.44的含义；(4)估计收入为35千元时消费支出的水平。计算结果保留两位小数。(1)绘制散点图； ...
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