What is the rate of change and initial value for the linear relation that includes the points shown in the table?
x y
2 3
4 5
6 7
8 9
1. Initial value: 1, rate of change: 2
2. Initial value: 1, rate of change: 1
3. Initial value: 2, rate of change: 2
4. Initial value: 3, rate of change: 2