Question 125015
To find the axis of symmetry, use this formula:


{{{x=-b/(2a)}}}


From the equation {{{y=x^2-9x-2}}} we can see that a=1 and b=-9


{{{x=(--9)/(2*1)}}} Plug in b=-9 and a=1



{{{x=9/(2*1)}}} Negate -9 to get 9



{{{x=(9)/2}}} Multiply 2 and 1 to get 2



So the axis of symmetry is  {{{x=9/2}}}