SOLUTION: If a quadratic function has its vertex at point (2,8) and the function passes through point (8,6), what is a,h, and k when written in vertex form if the function is f(x)=a(x-h)^2+k

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Question 365215: If a quadratic function has its vertex at point (2,8) and the function passes through point (8,6), what is a,h, and k when written in vertex form if the function is f(x)=a(x-h)^2+k.
Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!
If a quadratic function has its vertex at point (2,8) and the function passes through point (8,6), what is a,h, and k when written in vertex form if the function is .
Since it has vertex (h,k) = (2,8), 

h = 2 and k = 8.  That's 2/3rds of what you asked for!  All you

need is "a".

.

Since f(x) is the same as y, let's write it:

.

Since it goes through (8,6) we substitute 8 for x, and 6 for y















Now to check let's draw the graph of

.




Edwin
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