<PRE><B>Question 381315</B>
Give an equation of the parabola which opens either up or down given the three points of: (0,11), (1,21), and (-2,3) on the parabola.
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Form: ax^2 + bx + c = y
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Substitute each point into the Form and solve for a,b,c.
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0 + 0 + c = 11
a + b + c = 21
4a-2b + c = 3
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Use any method you know to get:
a = 2
b = 8
c = 11
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Equation:
y = 2x^2 + 8x + 11
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Cheers,
Stan H.
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