For both, we can find the rise over run (slope) and common trend between the y intercepts.
The rise over run for 1.: 3
The rise over run for 2.: 5
The trends for 1.: +3
The trends for 2.: +5
For 1. y=3x+3
For 2. y=5x+5
To find the Mean Absolute Deviation u need to find the difference between the numbers and the mean. Then find the mean of those differences.
ie 1,2,3
mean=2
differences: 2-1=1 2-2=0 3-2=1
1+0+1=2 2/3= .6 repeating