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Expert: - 2/23/2009


Question
Hi, I'm taking Precalc and I need help with a problem.
How do I write the equation of a parabala that passes through the points (0, 1) (2, -1) (1, 3).

Answer
Questioner:   Kelsey
Category:  Advanced Math
Private:  No
 
Subject:  Precalc Algebra 2
Question:  Hi, I'm taking Precalc and I need help with a problem.
How do I write the equation of a parabala that passes through the points (0, 1) (2, -1) (1, 3).
............................
Hi, Kelsey,

You take your basic form:

y = ax^2 + bx + c,

and your three points:

(0, 1) (2, -1) (1, 3)

and you substitute.  Then you will have three equations in a,b,c which you solve.

That's it.  

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