Question

AKAkgskhbasdjhbx;XKJLJ

Answer 1

Plug 2 into your equation see if you get 4
plug 3 into your equation see if you get 3
plug 2 into your equation see if you get 1

Answer 2

for 1 i got 17

Answer 3

2 i got 26

Answer 4

If you get all the same points from the equation that you have on your graph you can say that equation models it

Note:

\[(n, a_n)\]

Answer 5

3 i got 1

Answer 6

so

set,
n = 2
if
\[a_n = 4\]
then that is one point in your equation keep going if you get another value for a_n then it is not a model for the graph

Answer 7

do you follow?

Answer 8

is it c???

Answer 9

i 2 in for c and i got 1

Answer 10

Let me check

set n = 4
http://www.wolframalpha.com/input/?i=%281%2F3%29%283%29^%284-1%29

so this confirms that (4,9) is in the equation

lets check n = 3
http://www.wolframalpha.com/input/?i=%281%2F3%29%283%29^%283-1%29

so this confirms (3,3) is in the equation

Lets check n =2
http://www.wolframalpha.com/input/?i=%281%2F3%29%283%29^%282-1%29

so this confirms (2,1) is in the equation

therefore it can be said to model the graph

Answer 11

is that c?

Answer 12

yes

Answer 13

you were correct

Answer 14

can you help with this ?

Answer 15

Note you can do this for a continuous graph as well usually checking with 2 points is sufficient though, what I mean by a continuous graph is,



so if you were asked to figure out which equation from a list this fit in you could just pick random points from the line to check it