KUMON math

(1) The y-intercept is 1
The graph will be like this:

圖片參考：http://img257.imageshack.us/img257/4954/screenhunter02dec161556.png

http://img257.imageshack.us/img257/4954/screenhunter02dec161556.png

(2) The y-intercept is 2
The graph will be like this:

圖片參考：http://img152.imageshack.us/img152/8045/screenhunter03dec161558.png

http://img152.imageshack.us/img152/8045/screenhunter03dec161558.png

(3) The y-intercept is -1:
The graph will be like this:

圖片參考：http://img152.imageshack.us/img152/9880/screenhunter04dec161559.png

http://img152.imageshack.us/img152/9880/screenhunter04dec161559.png


2010-12-26 15:35:12 補充：
To sketch the graph:
you can mark down any three points of (x,y), and then join these three points

2010-12-26 15:35:35 補充：
and the points (x,y) should satisfy the equation given.

圖片參考：http://imgcld.yimg.com/8/n/HA00004060/o/701012160041913873428270.jpg

(1)the y-intercept of y=3x+1 is 1





圖片參考：http://imgcld.yimg.com/8/n/HA00004060/o/701012160041913873428271.jpg

(2)the y-intercept of y=x+2 is 2






圖片參考：http://imgcld.yimg.com/8/n/HA00004060/o/701012160041913873428282.jpg

(3)the y-intercept of y=3/2x-1 is -3