I think the answer you are looking for is 1
<u><em>NOT AT ALL 100% SURE :(</em></u>
Uuuiiiiiinhgufyjcnoigjkou
Check the forward differences of the sequence.
If
, then let
be the sequence of first-order differences of
. That is, for n ≥ 1,

so that
.
Let
be the sequence of differences of
,

and we see that this is a constant sequence,
. In other words,
is an arithmetic sequence with common difference between terms of 2. That is,

and we can solve for
in terms of
:



and so on down to

We solve for
in the same way.

Then



and so on down to


Reflected across x axis means y turns to -y, meaning, multiply the whole function by -1
f(x) times -1=-1 times (x+6)=-x-6
A is answer
X=25 and y=-2 so then y=-40 and x=? you will have to divide and and multiple and the answer will be x=500