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The graph of a certain quadratic y = ax^2 + bx + c is a parabola with vertex (-4,0) which passes through the point (7,1). What is the value of a?

 Jan 3, 2022
 #1
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Vertex (-4,0) form of parabola

 

y= a ( x- - 4)^2 + 0

  y = a (x+4)^2       sub in the point 7,1

  1 = a (7+4)^2   

        so a = 1/121

 Jan 3, 2022

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