Asked by Lilah
                Suppose a parabola has vertex (-4,7) and also passes through the point (-3,8), write the equation of the parabola in vertex form.
            
            
        Answers
                    Answered by
            Reiny
            
    you know it must look like this
y = a(x+4)^2 + 7
now force it to pass through (-3,8)
8 = a(-3+4)^2 + 7
1 = a
y = (x+4)^2 + 7
    
y = a(x+4)^2 + 7
now force it to pass through (-3,8)
8 = a(-3+4)^2 + 7
1 = a
y = (x+4)^2 + 7
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