Question 1002754
Another example which works the same way, is this one solved yesterday:
<a href="http://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.1002510.html">parabola function containing three known points</a>
http://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.1002510.html


Learn from that solved example because it is very similar, and the method is the same as what you can do for yours.