Question

Is this a quadratic or a linear realtion
x y
1 3
3 -3
5 -16
7 -33

Answer 1

well, x is increasing by a constant 2 each time, if y is increasing by a constant value each time then its linear

Answer 2

consider:

\[y=3+a(x-1)+b(x-1)(x-3)+c(x-1)(x-3)(x-5)\\~~~~~~~~~~~+d(x-1)(x-3)(x-5)(x-7)\]

Answer 3

that a(x-1) is redundant in that ....

Answer 4

or the 3 is, take your pick :)