<PRE><B>Question 1062481</B>
determine a possible quadratic function for points (2,7), (3,5) and (5,13).
-----------
2 parabolas can be found that pass thru the points.
---
y = ax^2  + bx + c is one.
---
4a + 2b + c = 7
9a + 3b + c = 5
25a + 5b + c = 13
----------
Eqn2 - Eqn 1:
5a + b = -2 **** Eqn 4
----------------
Eqn 3 - Eqn 2:
16a + 2b = 8
10a + 2b = -4  Eqn 4 times 2
---------------------------------- Subtract
6a = 12
a = 2
============
b = -12
=============
c = 23
================
f(x) = 2x^2 - 12x + 23
=======================================================
Find the 2nd one the same way, y as the independent variable.
</PRE>