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Quadratic Relations
A quadratic relation: all second differences are constant in the table of values.
Example of a non-quadractic realtion
X
Y
Ist Differences
2nd Differences
0
1
2
3
4
1
3
5
7
9
2
2
2
2
NA
Example of a quadtratic relation
X
Y
Ist Differences
2nd Differences
1
3
5
7
9
4
12
28
52
84
8
16
24
32
88
8
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