Question 1128358
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I neeed help graphing f(x)=x^2+
7x-8 I need to understand how to find the vertex, x-intercept,line of symmetry, and the opening of the graph.
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{{{f(x)=x^2+7x-8}}}


Function f is factorable.
{{{f(x)=(x+8)(x-1)}}}


The vertex and symmetry axis both are in the exact middle of the zeros of f.

Symmetry axis {{{x=-3&1/2}}}


{{{f(-3&1/2)=(-3&1/2+8)(-3&1/2-1)}}}
{{{-20&1/4}}}


vertex,  ( -3.5, -20.25 )



{{{graph(400,400,-20,20,-20,20,x^2+7x-8)}}}