Sample A Sample B

Question

x y x y
0 2 0 8
1 4 1 14
2 8 2 20
3 16 3 26
Sample A changes by a common ________ (factor, difference)
Sample B. Changes by a common ______(difference, factor)

Answer 1

Sample A changes by a common factor.
Sample B changes by a common difference.

In Sample A, each y-value is obtained by multiplying the corresponding x-value by a constant factor (2).
In Sample B, each y-value increases by a constant difference as x increases (the difference between consecutive y-values is always 6).