Write a linear equation for each table relating x and y.
1. X 0 3 6 10
Y 2 8 14 22
2. X 2 4 5 8
Y 5 8 11 14
3. X 0 3 6 10
Y 20 8 -4 -20
4. X 0 3 6 9
Y 20 11 2 -7
