could someone tell me if im doing 6 & 9 correct?

ill post my work and the question right below

Question

could someone tell me if im doing 6 & 9 correct? 

ill post my work and the question right below

math2400 · Answer

attachment

math2400 · Answer

here's the prob

math2400 · Answer

i honestly don't know if how i did it was correct. i used the xi and delta x formulas to figure what to input

anonymous · Answer

Grrr, I have to turn my head sideways to read it>_<

math2400 · Answer

really which one?? I took it the pic vertical. is it the one with my work?

math2400 · Answer

and excuse the horrible writing! im in a rush<<

math2400 · Answer

nvm i was lookin over it i did everything right but i forgot to include the delta x. knew i was missin something

ganeshie8 · Answer

yeah for #6 just multiply 5/n

ganeshie8 · Answer

wat about #9 ?

math2400 · Answer

yeah I figured that. and with 9 i just used b-a=3, a=2 so b-2=3 makes b 5 so i have |dw:1381985884232:dw| does that look right?