Question 96022
To find the axis of symmetry, use this formula:


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


From the equation {{{y=x^2+7x+4}}} we can see that a=1 and b=7


{{{x=(-7)/(2*1)}}} Plug in b=7 and a=1



{{{x=(-7)/2}}} Multiply 2 and 1 to get 2



So the axis of symmetry is  {{{x=-7/2}}} or {{{x=-3.5}}} (in decimal form)