17.
y关于x的一次函数y=kx+b的图象如图所示,则关于x的不等式kx+b<2的解集是( )
| A. | x<0 | B. | x>1 | C. | x<-4 | D. | x>-4 |
12.甲、乙两人在相同的条件下各射击5次,成绩情况如表,结合平均数和方差来分析,成绩较为稳定的是乙.
| 姓名 | 平均数(环) | 方差 |
| 甲 | 8 | 0.7 |
| 乙 | 8 | 0.28 |
11.已知一次函数y=-2x+4的图象经过点(x1,y1),(x2,y2),且y1<y2,则有( )
0 286703 286711 286717 286721 286727 286729 286733 286739 286741 286747 286753 286757 286759 286763 286769 286771 286777 286781 286783 286787 286789 286793 286795 286797 286798 286799 286801 286802 286803 286805 286807 286811 286813 286817 286819 286823 286829 286831 286837 286841 286843 286847 286853 286859 286861 286867 286871 286873 286879 286883 286889 286897 366461
| A. | x1>x2 | B. | x1=x2 | C. | x1<x2 | D. | 无法确定 |