You can put this solution on YOUR website! you graph a quadratic functions for Example f(x)=x squared+4x-7
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Fastest Way:
Find the vertex which occurs when x = -b/2a = -4/(2*1) = -2
Find f(-2) = (-2)^2+4*-2-7 = -11
Vertex: (-2,-11)
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Find a few points on each side of x=-2:
If x = -3, y = (-3)^2+4*-3-7 = -10'
If x = -1, y = -10
If x = -4, y = (-4)^2+4*-4-7= -7
If x = 0 , y = -7
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Plot those points; draw a smooth curve thru them to the left and to the right.
That is the graph.
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Cheers,
Stan H.
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