Given the 3 points you entered of (25,7), (23,16), and (1,12):
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 7
f = x-coordinate of 23
e = x-coordinate squared
232 = 529
g is always equal to 1
h = our y-coordinate of 16
j = x-coordinate of 1
i = x-coordinate squared
12 = 1
k is always equal to 1
l = our y-coordinate of 12