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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There's an example of this exact same kind of thing here.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.

Your system of equations will be:

a - b + c = -11

a + b + c = 0

4a + 2b + c = 9