SOLUTION: find the quadratic function, whose graph passes through the points (1,3),(-2,18) and (3,13)

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: find the quadratic function, whose graph passes through the points (1,3),(-2,18) and (3,13)      Log On


   

Question 106934: find the quadratic function, whose graph passes through the points (1,3),(-2,18) and (3,13)
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the general form is y=ax^2+bx+c ... substitute in the points, giving three equations with three unknowns (a,b,c)

3=a+b+c

18=4a-2b+c

13=9a+3b+c