Question 1179006
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            It seems to me that I do understand your request.


            Look attentively for my steps.



<pre>
f(x) has the (vertical) axis of symmetry  x = {{{-b/2a}}} = {{{-b/(2*3)}}} = {{{-b/6}}}.


It means that g(x) has the (vertical) axis of symmetry  x = {{{+b/6}}}.


Now, <U>from your graph</U>, you, the visitor,  <U>SHOULD SEE</U>  that axis of symmetry for g(x),

so you can restore the value of  {{{b/6}}} first, and then the value of "b" itself.
</pre>


In short terms, &nbsp;the symmetry axis for &nbsp;g(x) &nbsp;is the mirror reflection of the symmetry axis of &nbsp;f(x) &nbsp;relative the &nbsp;y-axis.



It means that &nbsp;b-value for &nbsp;g(x) &nbsp;is the opposite number to the &nbsp;b-value of &nbsp;f(x).



That is all.  &nbsp;Quite obvious.



Solved, &nbsp;answered and explained.