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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 (5,7). What is the value of a?

 Jul 10, 2022
 #1
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Vertex form

 

y = a ( x - h)^2  + k        where ( h, k)  = the vertex   and (x,y)  is another point on the graph

 

7 = a ( 5 - 4)^2  + 0

 

7  = a(1)^2

 

7  = a

 

cool cool cool

 Jul 10, 2022

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