![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
已知一次函数𝑦=kx+b(k,b为常数,k≠0)的图象经过一、三、四象限,则下列结论正确的是()
A.kb>0
B.kb<0
C.k+b>0
D.k+b<0
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、kb<0
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.kb>0
B.kb<0
C.k+b>0
D.k+b<0
B、kb<0
A.k>0 且 b>0
B.k<0 且 b>0
C.k>0 且 b<0
D.k<0 且 b<0
A.1个
B.2个
C.3个
D.4个
如果一次函数y=kx+b的图像经过点A(1,7)和8(0,2),则k=() (A)-5 (B)1 (C)2 (D)5
A.k>1,b<0
B.k>1,b>0
C.k>0,b>0
D.k>0,b<0