SOLUTION: f(x)=x^2+4x-45 Does the graph of f open up or down. What is the vertex (h,k) of f What is the axis of symmetry What are the intercepts

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Question 238486: f(x)=x^2+4x-45
Does the graph of f open up or down.
What is the vertex (h,k) of f
What is the axis of symmetry
What are the intercepts

Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
1.Opens up, controlled by the sign of coefficient, +up, -down
2.x coordinate of the vertex is
x=-4/2(1)=-2
y=(-2)^2+4(-2)-45=-49
(-2,-49)
3. Axis of symmetry is the x-position of the vertex, x=-2.

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