the table below shows a linear relationship between the average height in feet of trees on a tree farm and the number of years since the trees were planted
| 1 | 3 | 6 |11| 15 |numbers of years since the trees were planted
|10|24|45|80|105|average height(ft)
What is the rate of change of the average height in feet of trees on the farm with respect to the number of years since they were planted
