<PRE><B>Question 129387</B>
Find the quadratic model for the set of values.
(1,-2), (2,-2), (3,-4)
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Substitute each of those x/y pairs into the 
quadratic form y = ax^2+bx+c.
You will get three equations with variables a,b, and c.
Solve the system of equations.
Rewrite y = ax^2+bx+c with the values you find for a,b,and c.
Cheers,
Stan H.
Answer: y = -x^2+3x-4
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