Hello everyone, I do not how to initiate the first step for this question. However, I know it has to do with the vertex and the axis of symmetry. The attached image is the question. Pls help me out!Attachment 30856

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- May 7th 2014, 03:00 AMxwyfinding a and b in quadratic function
Hello everyone, I do not how to initiate the first step for this question. However, I know it has to do with the vertex and the axis of symmetry. The attached image is the question. Pls help me out!Attachment 30856

- May 7th 2014, 03:16 AMProve ItRe: finding a and b in quadratic function
The axis of symmetry is x = -b/(2a).

- May 7th 2014, 09:48 AMHallsofIvyRe: finding a and b in quadratic function
Alternatively, if the axis of symmetry is x= -3/8 the quadratic is of the form $\displaystyle y= a(x+ 3/8)^2+ e$. The fact that "c" is equal to 7 will allow you to find one of a and e as a function of the other but you cannot determine both.

- May 7th 2014, 05:03 PMProve ItRe: finding a and b in quadratic function