SOLUTION: I need to write a quadratic function in standard form for a parabola shown. It gives me three different point on the parabola which are (2,7), (3,2), and (5,4). What is the andswer

Question 366152: I need to write a quadratic function in standard form for a parabola shown. It gives me three different point on the parabola which are (2,7), (3,2), and (5,4). What is the andswer and how am I supposed to get the answer? And the parabola opens up.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Use the general form of a quadratic equation.

1.
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2.
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3.
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Now you have three linear equations in three unknowns (a,b,c).
Solve using any method (substitution, elimination, matrix methods).
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It looks like the parabola opens upwards.

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