Please help! Geometric sequencing!

Question

anonymous · Answer

attachment

vlery · Answer

what do you need to know?

anonymous · Answer

I need to make an equation.. -.-

vlery · Answer

xn = ar(n-1) use that and ask what is the 8th number in the sequence

anonymous · Answer

?

anonymous · Answer

@xiphoidx  what vlery said is true :)

anonymous · Answer

so how do I set it up? I just need to have it explained to me :)

anonymous · Answer

just use xn = ar(n-1) then like vlery said once u find the 9th number in the sequence just input that number and you get your equation

anonymous · Answer

8th number not ninth

anonymous · Answer

how do you get the 8th number? (sorry... I just learned this)

anonymous · Answer

sorry but i can thelp nymore im doind an exam myself right now just tag velry once again and fan him hopefully he's nice enough to explain

anonymous · Answer

ugh ok

anonymous · Answer

sorry my freind :(

vlery · Answer

well first off can you find the slope?

anonymous · Answer

um 2/7 ?

vlery · Answer

there you go now just do that to the top point and keep going up till you hit the 9th number

anonymous · Answer

there aren't 9 numbers

vlery · Answer

I mean you take the point (3,9) and add the slope to that and keep adding the slope to the next number till you hit the 9th set

anonymous · Answer

oh I did that the slope is 7/2... the slope od the first 2 is 2/1