Question 1128358

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.
<pre>Unless you want to ALWAYS be WRONG, go along with this person. 
Again, just pretend as though no-one responded to your math question should this person respond to your question.
BTW: The graph opens UPWARD since "a" is > 0 (positive)

IGNORE all below as it's all RUBBISH:<s>
Symmetry axis {{{cross(x=-4&1/2)}}}


{{{cross(f(-4&1/2)=(-4&1/2+8)(-4&1/2-1))}}}
{{{cross(-19&1/4)}}}


Vertex,  (  -4.5, -19.25 )</s>{{graph(400,400,-20,20,-20,20,x^2+7x-8)}}}