## writing quadratic equation for a graph

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
Motherof8
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Joined: Sat Feb 12, 2011 12:32 am
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### writing quadratic equation for a graph

Write a quadratic function that fits each set of points: (-1,-11), (1,0) (2,9). I plotted these points on a graph but I cannot find a common equation that would fit all these points. Would appreciate advice that would help solve this problem. Thank you.

maggiemagnet
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Joined: Mon Dec 08, 2008 12:32 am
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### Re: writing quadratic equation for a graph

Write a quadratic function that fits each set of points: (-1,-11), (1,0) (2,9). I plotted these points on a graph but I cannot find a common equation that would fit all these points. Would appreciate advice that would help solve this problem. Thank you.
There's an example of this exact same kind of thing here.

Your system of equations will be:

a - b + c = -11
a + b + c = 0
4a + 2b + c = 9