Answer:
every +1/2 increases 3.25
Explanation:
1/2 ------------------->3.25
2/2 = 1--------------->6.5
3/2 = 1 1/2----------->9.75
4/2 = 2 -------------> 13
5/2 = 2 1/2--------->16.25
6/2 = 3--------------->19.5
7/2 = 3 1/2----------->22.75
8/2 = 4 --------------->26