Graphs of funtions II(Math)

Walao~

i'm very bek cheh now~

i don't understand wat the teacher teaching~

she teach veri veri fast like roket lo~

 The teacher make me veri confusing~ 

Luckily my friend(kuan kuan,sian ru) had teach me how 2 do~

but,stil had confuse lo~

haiz~

@,@