截距是什么意思,spss中的截距啥意思？ _生活知识

指函数与坐标轴所有交点的（横或纵）坐标之差,可取任何数.
曲线与x、y轴的交点（a，0），（0，b）其中a叫曲线在x轴上的截距；b叫曲线在y轴上的截距。截距和距离不同，截距的值有正、负、零。距离的值是非负数。
注意：
1.截距是实数，不是“距离”，可正可负。截距之和即：X轴上截距与Y轴上截距之和。
2.解题中若遇到某直线到X,Y轴截距相同,就还需要考虑到该直线过原点的情况
【截距是什么意思,spss中的截距啥意思？】一次函数中的截距：
一次函数y=kx+b，则b就是在Y轴的截距，而k是斜率
横截距与纵截距:
直线l与x轴交于点A(a,0),与y轴交于点B（0,b）则a叫作直线l的横截距，b叫作直线l的纵截距。

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2、一般说截距就是指纵截距,横截距就是指直线与x轴交点的横坐标。

3、这个概念也可以推广到一般的曲线。

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spss中的截距啥意思？
spss中的截距被称为“Constant”，即84.959 。它是指当自变量值都为0时，因变量的值。这种截距值并不是真实存在的，为了避免对数据的过度挖掘。
SPSS是用于统计学分析运算、数据挖掘、预测分析和决策支持任务的软件产品及相关服务的总称，有Windows和Mac OS X等版本。