Each set of data can be modeled by the quadratic function f(x) = ax 2 + bx

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Each set of data can be modeled by the quadratic function f(x) = ax2 + bx + c. 


(a) Write a linear system whose solution represents values of a, b, and c. 


(b) Use technology to find the solution. 


(c) Graph f and the data in the same viewing rectangle. 


(d) Make your own prediction using f.


The table lists total iPad sales y in millions x quarters after its release.image

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