14 2 2
This presentation is the property of its rightful owner.
Sponsored Links
1 / 12

14.2.2 一次函数 PowerPoint PPT Presentation


  • 86 Views
  • Uploaded on
  • Presentation posted in: General

14.2.2 一次函数. 重点:一次函数的概念. 复习 1 、正比例函数的解析式。 2 、函数 y=-2x 的图象和性质。 3 、画函数 y=-2x 的图象的一般步骤。. 形如 y=kx(k 为常数, k≠0) 的函数。. ( 1 )图象是经过原点的一条直线 ; (2) 图象经过二、四象限,图象左高右低向下降, y 随 x 的增大而减小。. ( 1 )列表 ( 可以省略 ) ( 2 )描点 [ 由于图象是经过原点的一条直线,只要再找一个点就可以了,一般找( 1 , k ) ] ( 3 )连线(用直尺画图). 新课

Download Presentation

14.2.2 一次函数

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


14 2 2

14.2.2


14 2 2

  • 1

  • 2y=-2x

  • 3y=-2x

y=kx(kk0)

1;

(2) yx

1()

2[1k]

3


14 2 2

  • 5C1km6 C xkmy C yx

yxxkm5 C6x C

y=5-6x

y=-6x+5


14 2 2

  • 12025ctCct735

  • 2G()h105G

c=7t-35

G=h-105


14 2 2

  • 3y()22x0.1/;

  • 10cm5cmxcmy()x

y=0.1x+22

y=-5x+50


14 2 2

x


14 2 2

  • y=kx+b(k,b,k0)

  • b=0y=kx+by=kx.

  • 1;

  • 2 kbk 0,b0


14 2 2

  • 200yx

200

0x200 y=x;

x>200 y=0.8(x-200)+200 y=0.8x+40


14 2 2

  • 1y=-8x;

  • 2y=0.5x-1;

  • 3y= +3x-2

  • 4l=0.5m+10;

  • 5y=


14 2 2

  • 1

  • 2

y=kx+bk,bk0

y=0.15x+12y=0.8x+40


14 2 2

  • 114.23

  • 2P81


14 2 2


  • Login