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【单选题】
若y与x之间满足关系式 a x +y= 1 x (a 为不等于l的常数，x、y为变量），则y是x的（ ）A.
一次函数
B.
正比例函数
C.
反比例函数
D.
都不对
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举一反三
【单选题】Which of the following is not a common pitfall of regression?
A.
If the assumptions are not met, the statistical tests may not be valid.
B.
Nonlinear relationships cannot be incorporated.
C.
Two variables may be highly correlated to one another but one is not causing the other to change.
D.
Concluding that a statistically significant relationship implies practical value.
E.
Using a regression equation beyond the range of X is very questionable.
【判断题】One other concluding technique is making a direct appeal to your audience for action, this technique applies only to a particular type of informative speech.
A.
正确
B.
错误
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