Given the 3 points you entered of (25,13), (2,18), and (23,1):
Calculate the quadratic equation formed by those 3 points
b = x-coordinate of 25
a = x-coordinate squared
252 = 625
c is always equal to 1
d = our y-coordinate of 13
f = x-coordinate of 2
e = x-coordinate squared
22 = 4
g is always equal to 1
h = our y-coordinate of 18
j = x-coordinate of 23
i = x-coordinate squared
232 = 529
k is always equal to 1
l = our y-coordinate of 1