For each table make a scatter plot of the data. Draw a trend line and write its equation.


20.
X Y
2 3
4 6
5 5
7 7
8 9
8 8

21.
X Y
3 9
5 8
5 6
6 5
6 6
8 3

22.
X Y
1 1
2 3
3 5
3 6
5 8
6 9