Posted by **zach w** on Wednesday, November 14, 2012 at 3:31pm.

determine the qudratic function whose vertex is (2,-4) and passes through

(3,-1)

fx=

- cllege algebra -
**Reiny**, Wednesday, November 14, 2012 at 4:16pm
since we know the vertex, let it be

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

but (3,-1) lies on it

-1 = a(1) - 4

a = 3

y = 3(x-2)^2 - 4

- cllege algebra -
**zach w**, Wednesday, November 14, 2012 at 9:31pm
new question using the square to descibe the graph of fx= -8 -16x-x^2

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