5 The table shows the linear relationship between the average height in feet of trees on a tree farm and the number of years since the trees were planted.
Average Tree Height
Number of Years Since
1 3
the Trees Were Planted
6
11
15
Average Height (ft)
10
24
45
80
108
What is the rate of change of the average height in feet of the trees on the farm with respect
to the number of years since the trees were planted?
A 14 ft/yr
B 3 ft/yr
C 7 ftyr
D 10 ft/yr